In this heart-pounding thriller, women are being found dead on train tracks across the country, forcing the FBI into a mad race against time to catch the serial killer. FBI Special Agent Riley Paige may have finally met her match: a sadistic killer, binding victims to the tracks to be killed by incoming trains. A killer smart enough to evade capture across many states - and charming enough to go unseen. She soon learns it will require all of her faculties to enter into his sick mind - a mind which she unsure she wants to enter.

Still reeling from her former partner Lucy’s death and from her partner Bill’s PTSD, FBI Special Agent Riley Paige does her best to try to keep herself stable and to patch together her family life. She has to decide what to about April’s boyfriend, recovering from his abusive father, and about Blaine, who is ready for their relationship to move ahead. But before she can work it out, Riley is summoned for a new case. In an idyllic suburban town in the Midwest, teenage girls are going missing - and a body has already turned up.

In this dark psychological thriller, a wealthy husband turns up dead, and his abused wife is charged with the crime. She calls Riley for help - and yet it seems clear she is guilty. But when another wealthy, abusive husband turns up dead, the FBI is called in, and FBI special agent Riley Paige wonders: Is this all a coincidence? Or could this be the work of a serial killer? What ensues is a game of cat and mouse, as Riley Paige realizes she is up against a brilliant and unpredictable killer, one without a clear motive - and one determined to keep on killing until he is caught.

There is one cold case that has plagued Special Agent Riley Paige for her entire career, dwelling at the corners of her consciousness, forcing her to return to it again and again. The only case she has never solved, she has finally put it out of her mind. Until she gets a call from the murdered victim's mother. It spurs Riley to face the case once again, and to not give up until she has found answers. Yet Riley barely has time to catch her breath when she receives a lead for another cold case, one which, if possible, strikes an even deeper note within her.

After lying dormant for 10 years, an elusive serial killer strikes again, leaving few clues, and the only way for FBI special agent Riley Paige to catch him in the present is to solve the riddles of the past. Women are turning up dead, and in this dark psychological thriller, Riley Paige realizes she is in a race against time.