Do not turn off your phoneDo not get off the trainI know who you really are Fired and walked out by security on his first day at his new job in New York City, Ben Cross thought his day couldn't get worse. But he couldn't be more wrong. Getting on the 1 train headed uptown, Ben starts receiving text messages from an anonymous killer, showing that they've already killed someone, then pointedly killing another as they got off the train to prove they aren't bluffing and to ensure Ben follows orders. But Ben wasn't picked at random—he has a history that no one is supposed to know. At the same time, A NYPD detective, Kelly Hendricks, is on punishment duty with the transit police. The first one on the scene after the first murder, she gets on the train to find out what is really going on. Switching rapidly between Cross and Hendricks, as the hijacked 1 train heads from South Ferry to 181st, the secret to the killer lies in Ben's own history—why he's been targeted and punished.