But 50 yards away, a chic, striking young Russian woman catches it all while idling in her blacked-out Pontiac. She looks like she’s on her way to the office, but she’s already at work. She’s Special Agent Lili Infante, a rookie DEA officer in the Miami unit, on her first field surveillance lead. The mission is a setup. The bagman is an undercover agent. Arrayed in position around the strip mall are a dozen or so heavily armed federal agents, all waiting on Lili’s command. Less than a year out of the academy, this is her first major test. She’s not just coordinating surveillance, but she’s taking “the eye,” meaning she is tracking the target so the entire unit can follow, undetected. So far everything is going to plan, which is a relief, because Lili is desperate to prove herself. She’s an Ivy League grad and a Russian immigrant, and she was the only woman in her academy class. In the most macho, all-American branch of US law enforcement, that’s three strikes against her, even in 2014. She’s sure everyone expects her to blow it. But Lili’s a lifelong overachiever. She volunteered to take the eye precisely because it’s a tough assignment nobody wants. “Target is on the move,” Lili calls into her radio. A dozen keys turn in their ignitions. Lili lets the target pass by, plus a few cars for cover, then slips into the line of commuters. On the radio: chatter from the team out of sight. “Target location?” Taking the eye is stressful. You have to stay close and not draw attention, or stay back and not lose visual, or both, and all the while be prepared for the target to get spooked. At any moment, they might rip a sudden U-turn or swerve onto an exit, trying to suss out a tail. Or pull a heat run, having been made. Then you’re in pursuit, calling in a helicopter, turning a dangerous situation more dangerous. Lili has seen it before, many times. What you want is for it to go smoothly. “Target direction?” Lili glances at her phone, trying to note the next cross street to report back to the team. She’s newish to Miami and doesn’t know this area well. It’s hard to know any area well when it all looks the same—a featureless landscape of wide, long blocks with medians, a strip mall on each corner at every intersection, fringed by endless palms. She doesn’t know the direction. This is why she’s consulting her phone. But the map app isn’t working. The radio is crackling with confusion. It’s not going smoothly. The problem is this is not her phone. It belongs to her husband, Luis. He’s also a DEA agent. And this morning, while Lili was prepping for the mission and getting their daughter ready for preschool, she couldn’t find her phone. So on her way out the door, she grabbed Luis’ old Android. WhatsApp needs to be updated, says the persistent notification, blocking the map screen. Driving with her knees, Lili tries to deal with the phone while watching the target. He’s turning. WhatsApp needs to be updated. Fuck, she thinks, this can’t be happening. She’d planned to overcome the prejudice against her, and female agents everywhere. Now, on her first mission as surveillance lead, she’s losing her cool because of a phone snafu? Furiously tapping the exit icon, she accidentally opens WhatsApp. “What the fuck!” she shouts. Then she notices something—a message from a very young, very beautiful woman: “I miss you.” At first, Lili’s confused. Then she opens the chat and sees a history of carnal correspondence between this woman and Luis. Her heart drops. She pulls over. With Lili’s silence, the radio comms grow frenetic. “Is he pulling a heat run?” Lili is frozen. The DEA has assembled a massive unit to shut down a high-powered narco money launderer, and she is on the side of the road, reading flirty texts from her husband’s mistress. She’s losing the target. But all Lili can think about is betrayal. The messages are endless. It’s not the first time. The image she’s had of herself and Luis, the eager greenhorn agent and hotshot husband, is coming apart in real time. What about their 3-year-old daughter? She remembers the mission. The target they’re tailing is surely armed. A key rule of leadership is full faculties. One mistake and someone could get killed. She’s clearly lost tactical command. Just as they all expected, she thinks. Failing when it counts. Lili knows this could hurt her career. What she doesn’t know, in this moment, is just how far her career will eventually go; that this gut punch will catalyze her emergence as an unlikely pioneer in an entirely new kind of criminal investigation. That she will help seize millions of dollars in illicit cryptocurrency, arrest some of the world’s most treacherous criminals, and help write the playbook still used in digital money-laundering investigations. Her colleagues will know her as a principled, dogged, ruthless, sometimes frustrating but always inventive woman waging a highly personal crusade. And when she helps take down the largest and most sophisticated dark-web marketplace in history, her targets will place a $4 million bounty on her head. But right now, she’s just heartbroken. “Infante!” she hears over the radio. “Where are you?” It was spring 2007, Lili’s sophomore year at Columbia University. She was a serious and studious economics major who cut a notable figure on campus, a tall Russian émigré who rarely socialized. Having grown up in the chaos of post-Soviet Moscow, in an unstable household, Lili sought structure, discipline, and excellence. She planned to outwork her peers and land a coveted internship on Wall Street her first summer. Among the few diversions Lili permitted herself were weekly Skype calls with her grandmother Nina, back in Russia. Lili had a complicated relationship with her mom, a divorced drinker with a string of boyfriends, but Nina was her closest confidante, the only person she truly trusted. Lili would stay up late to tell Nina about life in America, her inability to integrate into campus culture, and her ballroom dance club, which was her other recreational indulgence. Lili didn’t like “fun,” per se, but she liked dancing for the same reason she liked school—it’s orderly, choreographed, predictable. Critically, it’s also nonverbal. Conversation doesn’t come easily to Lili. All her life, she’s felt like an outsider, an amateur anthropologist peering in on humanity rather than participating in it. A room full of twisting, twirling, silent strangers is one of the few places Lili feels ordinary. As the spring semester drew to a close, Lili set her eye on summer jobs. She’d applied for a financial analyst position at Citi’s wealth management division and another position, described only as “Russian language analyst,” which she’d stumbled across on a career board. One day, she received offers from both jobs, minutes apart. She could report to duty at Citi Wealth, fulfilling a longtime goal. Or she could accept the analyst position, which mysteriously listed no employer, only an address: 99 10th Avenue. This turned out to be the Manhattan headquarters of the Drug Enforcement Administration. She was intrigued. As a child in Moscow, Lili had been obsessed with American police procedurals. She was drawn to their clean message of good versus evil and the inevitability of justice, which was the opposite of the lawless kleptocracy she knew. During her childhood, Moscow was ruled by gangs. The police often worked for bribes. Here, the police came when you called. She admired them. But should she begin her career on Wall Street or realize her childhood dream of fighting crime? The following Monday, Lili showed up at DEA headquarters, a giant industrial box in Chelsea just south of the neighborhood’s blue-chip art galleries. A receptionist guided her through a warren of fluorescent-tube-lit hallways and deposited her in a room with a huge bulletin board, classically arranged with mug shots, question marks, thumb tacks, and byzantine constellations of yarn. An agent straight out of central casting—bald, no-nonsense, sturdy—introduced himself and showed her around. Lili couldn’t believe it. The agent told her what she’d be working on, a RICO investigation into Russian gangsters based in Brighton Beach. She would operate a wiretap and translate in real time the conversations of drug runners, money mules, foot soldiers, and hit men. “Think you can handle that?” the agent asked. Lili was stunned. “Yes,” she said, after collecting herself. “Hell yes.” “Good,” he said. He handed her a set of headphones. “Welcome to the DEA.” The moment she tuned into the wire and heard unfamiliar voices, she was hooked. Lili has always loved the puzzle-solving aspect of surveillance. Growing up, she often eavesdropped on her mother’s phone calls, trying to decipher the mechanics of adults and their relationships. The wire provided a new outlet for that voyeuristic impulse. Spying felt right. She happily pulled triple shifts. Lili was aiding an investigation into a gang led by a man named Boris Nayfeld. He came to power by seizing control of the Bratva—the Russian mob—in Brighton Beach after an alleged assassination. His gang had hooks in every racket imaginable: drugs, diamond smuggling, human trafficking, Medicaid fraud, murder for hire. Lili’s primary targets were two Ukrainian brothers, Nikolai and Arthur Dozortsev, who were linked to importing ecstasy tabs by the million from Southeast Asia and laundering the profits through shell companies and luxury items. They were rumored to own a hilltop villa in the French Riviera, a Riva Vertigo yacht, and an Aston Martin Vanquish coupe. They were high-profile fixers—and very scary men—who turned out to have very ordinary conversations with family, friends, girlfriends, dentists. Lili was fascinated by the mobsters’ quotidian chatter. She wondered: Was everyone capable of evil? Lili is a dogmatically ethical person. Dishonesty, betrayal, and violence confound her. And here were stone-cold criminals, leading otherwise normal lives. As Lili translated, agents worked in the field, acting on the intel she gathered—raiding stash houses, making arrests. Others supervised her surveillance. One of those was a brash, handsome 32-year-old lead case agent named Luis Infante. Surveillance is like war: mostly boring. Between crucial moments, there’s a lot of time spent lounging, spinning around in cheap swivel chairs. Eventually, Luis and Lili got to talking. Luis was half Puerto Rican, half Cuban, born in Yonkers; he’d become a special agent after four years with the NYPD and the state troopers. His was not such a strange path. But how did an Ivy League sophomore, Luis wondered, end up in a basement operating a wiretap? Lili started at the beginning. She was born Lilita Shabazian in 1987, in Moscow. Her mother, Katya, had aspired to be an actress but got pregnant at 19. Unwilling to sacrifice her own youth, Katya spent nights partying. Alone at home, an 8-year-old Lili made her own dinner and sat in front of the TV, sipping her mother’s booze and watching reruns like Walker, Texas Ranger. Katya maintained their meager household by selling clothes in the local market. At times, Katya traveled, leaving Lili in the countryside with her grandmother, Nina, a strict and independent woman. Nina grew her own food and made her own elaborate dresses. She had high hopes for Lili and would sit with her granddaughter and read the classics: War and Peace, Crime and Punishment, and Lili’s favorite, The Three Musketeers, with its themes of loyalty and courage in the face of corruption. Nina was a bright spot in a bleak childhood, much of which Lili spent wandering the streets of Moscow with other aimless children. “For us,” Lili told Luis, “there were no piano lessons.” One night, Lili told Luis a story about how, when she was a child, a local gang threatened her mother. In Moscow at the time, anyone who sold goods had to pay for protection; Katya paid a gang that came cheap and was low in the local hierarchy, which left her open to intimidation. One day a bigger gang decided to target Katya's business partner, kidnapping him, beating him, and leaving him for dead in the forest. Then they set their sights on Katya and demanded $50,000, threatening to abduct Lili and send her back in the mail, piece by piece. Lili recalled seeing her mother in tears on the phone, begging for mercy. No one came for Lili, but Katya blamed herself for the predicament. She started drinking heavily to dull the regret. That was when Katya started disappearing, eventually for days at a time—and when Lili's obsession with American cops and robbers took on new meaning. On Law & Order, the law wins. For Lili, justice became a fantasy. Now in America, at the DEA, Lili could live that dream. By midsummer, she was anxious for a breakthrough in the case. She wanted Nayfeld and his goons—Russian gangsters just like the men who tormented her mother—behind bars. Luis explained that RICO investigations could take years. Law enforcement is often about patience, he said. Lili had a hard time with that. They listened for hours, waiting for Nayfeld’s henchmen to make evidentiary mistakes. What they heard was mobsters running errands around Brighton Beach. The long shifts spent listening meant more late-night chats. Luis asked how Lili came to the States. She thought she was doomed to live and die in Russia, she said, but one day, when she was 11, the phone rang. “Hello, Lili,” a man said. “This is your father.” It was the first time Lili could remember crying. Her father had disappeared when she was a toddler. She had never known his voice. A few days later he was at the door, a burly man with dark brows, fitted into an expensive suit. He didn’t explain why he’d left, or now returned. In the US, he had become successful. Something about selling tires. Later Lili would come to realize his business was “connected,” but as a poor girl in Russia, she was amazed as he introduced her to a world of ease and excess. Lili had grown up with a single pair of pants and no winter coat, and now her father waltzed into Moscow’s elite boutiques and gave her free run of the stores. He took her to Moscow’s finest restaurants. Then he said he was bringing her to America. Lili didn’t want to abandon her family, but her mother and grandmother urged otherwise. She should leave, they said, and have a life. The other children in their neighborhood had already turned to crime. Some kids she knew were drug dealers and prostitutes. In Moscow, they said, there was nothing for her. America was as different from post-Soviet Moscow as Lili imagined, but she was still mostly on her own. Her father remained wildly generous at times but could also turn manic or sadistic; he’d shower her with gifts, then beat her for any perceived imperfection. He sent Lili to the Windsor School in Queens and then to Loomis Chaffee, an elite private academy in Connecticut. It took Lili only a few months to become fluent in English, but she didn’t make many friends. “I didn’t know how to act,” Lili told Luis. “I was like a hood rat.” And so she studied and studied, outpaced her peers, skipped a grade, and found herself 17 years old and enrolled at Columbia University in New York. Before Luis, Lili had shared her story with very few people. But something about him made her feel comfortable. Luis was charming, funny, and incredibly handsome. He had a wide smile, dark hair, and bright green eyes. He was married, though, so Lili hid the feelings she was starting to have for him. Toward the end of the summer, Luis came clean: He was falling for her too. He was separated from his wife, he said. He begged Lili to be with him. She demurred. She admitted her own attraction, but an affair went against her ethics. His marriage was already through, he said. She remained resolute. Now it was awkward. They were still up late together in the wiretap room. Alone, side by side, listening to the mobsters chat—or worse, have phone sex with their girlfriends—Lili and Luis batted romantic repartee at each other. He loved her, he said. Midlife crisis, she shot back. I’m only 32, he said. I’m not yet 20, she replied. Lili stood her ground. Come Autumn, Lili returned to school and passed the wiretap to a new analyst. Luis and his wife entered couples therapy. As the leaves turned and Lili settled into her sophomore classes, she moved on. And then, one morning, her phone buzzed. “I left her. It’s over. I need to see you.” After Luis left his wife, Lili dated him through college and fell madly in love. After class, she met him downtown in pubs and dives, where Luis talked about the day’s dangers and shared stories from his time at the NYPD: chasing a dealer down a Bronx alleyway; wrestling a gun from a man’s hand in a high-rise hallway. Then they went back to his place. With each date, Lili’s world of exams and problem sets seemed increasingly frivolous. By the time she graduated, in 2009, the idea of Wall Street was long gone and she was set on becoming a federal agent. But it was the Great Recession, and the DEA didn’t seem to be accepting applications. So Lili and Luis married, moved in together, and had a daughter. Lili loved being a mother but quickly understood that she did not want to be only a mother. Lili roamed their apartment cradling Lia. During nap time, she called her grandmother. Once, when Lili was lamenting the challenges of motherhood, Nina offered a startling idea: Why not bring Katya to live with them and help raise Lia? Lili was reluctant. Chaos followed Katya everywhere, plus she was still drinking. But Nina said that she just needed something to live for. Otherwise, it was only a matter of time before she overdosed in her apartment or passed out in a snowbank. Nina had never steered Lili wrong. Lili booked her mother a flight. Katya made a strange addition to their home. She couldn’t drive and spoke almost no English. Her Russian was stilted and aristocratic, an affectation she had picked up while nannying for a Russian oligarch in Dubai after Lili left for America. Her typical uniform was a fur coat, silk pantsuit, and 5-inch stilettos. Katya is something of a post-Soviet Blanche DuBois, an aging beauty obsessed with status and regret, always complaining, or boasting about her greatest achievement: almost being cast, at 17, as the lead in a 1980s Soviet film. With Katya available to watch Lia, Lili contemplated the most prestigious way to fill her time while she waited out the dismal job market. On a whim, she applied to Harvard Extension School, got accepted, and began taking classes. She loved being back in the world, learning, striving. But then Luis accepted a plum but dangerous post in El Salvador, where he would be investigating high-level drug trafficking operations and acting as a diplomatic liaison. Lili, Katya, and baby Lia joined him, and the Infantes moved into a palatial embassy house, complete with a cook and a maid, whom Katya relished ordering around. Theatrics aside, Katya improved once she was surrounded by family. She quit drinking and threw herself into caring for her granddaughter, just as Nina had predicted. She was a doting and careful (if theatrical) babushka, seemingly intent on making up for the ways she had neglected her own daughter. For Lili, it was healing to watch. But she was still restless. Determined to finish her degree, Lili started flying back and forth to Cambridge weekly—a five-hour flight, during which she crammed case studies. At home in El Salvador, she finished problem sets while rocking Lia to sleep. After two years, she graduated from Harvard with honors and submitted her application to the DEA. At the DEA academy in Quantico, Virginia, Lili considered the question, which she assumed was rhetorical. It wasn’t, as she discovered when her instructor, an older, bulging, terrifying woman, repeated it, much louder. “Neither?” “WRONG!” the instructor said. “As a woman, to survive in this agency, you’ll have to become either a bitch or a slut. Take your pick.” (The DEA declined to comment on the record for this story.) It was 2014. Lili was the only woman in her class. Her peers were very large men accustomed to violence: former police looking to up the stakes and Afghanistan vets in search of a new thrill. Lili dominated many of them academically, answering questions first or correcting their errors. In athletic training, she was ferocious, pouncing on her training partners in boxing, wrestling, and jiu-jitsu, even though she was half their size. She wanted to dispel any suspicions about female timidity. She succeeded. No one at Quantico had ever met anyone—man or woman—quite like her. “Instead of a bitch or a slut, I chose a third option,” Lili says. “I was annoying.” After 20 weeks of training, Lili graduated near the top of her class. She would be stationed in Miami, where Luis had already been reassigned after his stint in El Salvador. Ever since the cocaine explosion of the 1980s, Miami had been America’s central depot for the drug. Geography made it inevitable. The city leans into the Atlantic, pointing toward the Caribbean—the source of endless contraband, smuggled in by imaginative cartels. In the heyday of the cocaine trade, powerboats rocketed across Biscayne Bay, their hulls stuffed with powder. Cessnas drifted in low over the skyline, dodging radar to land on airstrips in the Everglades. Cartel divers attached magnetic parcels to cargo ship hulls. Homemade narco subs slipped unseen beneath the surface. For the Miami DEA office, this still meant constant action and late nights on dangerous cases—exactly what Lili was looking for. Compared to the dingy New York office, the Miami DEA was a gleaming palace of spotless glass and marble. Agents drove fast cars and hit the extensive first-floor gym before their shift, setting personal records on the bench or running combinations on punching bags before heading upstairs. This was the office that had brought down Noriega, rooted out a Hezbollah money-laundering ring, and once intercepted the sale of a $35 million Soviet submarine to cartel leaders in Colombia. Lili wanted in. Instead, she was given trash detail. On one of her first days on the job, Lili stood alone in a remote warehouse, tossing ziplocks full of drugs into an incinerator, marking the destroyed evidence on a clipboard. She was also pulling stints on the Miami DEA’s most dreaded post: the Duty Box, a closet-sized post where her two jobs were to answer the anonymous tip line and buzz visitors into the boss’s office. Lili was one of four women in her unit. The DEA culture was dated—the veterans who dominated the agency were called Jurassic narcs—and her office had a hard-partying style. After work, agents hit the bars and clubs together. But Lili didn’t drink. Having watched her mother’s undoing, Lili likes to say she “got sober at 12 years old,” when she left Russia. Instead, she stayed late at the office, filling out busywork reports with dizzying thoroughness. On weekends there were backyard barbecues, but Lili was rarely invited. Instead she went to Yuca 105, a Cuban restaurant in South Beach where she danced salsa. Yuca had serious dancers, the kind who don’t party, or make small talk, or do anything to compromise their focus and coordination. Lili fit right in. She’d drive home drenched in sweat, a momentary bliss. Meanwhile, the assholes back at work called Lili “Sochi,” after the Russian city that was hosting the upcoming winter Olympics. On a team-building trip to the International Spy Museum, they pointed at placards on Russian agents through history: “Friends of yours, Sochi?” “Don’t take it personally,” Luis said. He wanted to support Lili, but he was stationed in a different office, across town. He knew Lili would be a great agent, but he also knew that her social graces, or lack thereof, might be holding her back. She tended to ruffle feathers. She was bad at reading the cues of an institutional culture. Lili always …