A serial killer is terrorizing London, removing a body part from each victim and leaving in its place a single pink rose. Dr. Vernon Sange, a multiple murderer awaiting extradition, seems to know the culprit’s identity --- but he’ll only talk to profiler Ziba MacKenzie, the woman responsible for putting him away. Though there’s something he wants in return from her. And time is running out. With one killer whispering in her ear and another running rings around the police, Ziba must play a game in which only her opponent knows the rules, and the forfeit is death.

Offender Profiler Ziba MacKenzie arrives at the scene of a gruesome murder with a disturbing sense of déjà vu. Nine days earlier, another woman’s body was found: same location, same MO, same physical appearance. For the police, it’s clear that a new serial killer is on the loose. But for Ziba, it’s even more sinister --- because the victims look just like her. Ziba has been the focus of a killer’s interest before, and knows that if she gets too close again, this case could be her last. Still, she’s not one to play by the rules --- especially when her secret investigation into her husband’s murder begins to attract unwanted attention. Can Ziba uncover what connects the two victims before she becomes one herself?

Rush hour, London. A packed commuter train is torn apart in a collision. Picking through the carnage, ex-special forces profiler Ziba MacKenzie helps a dying woman who passes on a cryptic message: He did it. You have to tell someone. When a corpse is found bearing the gruesome signature of a serial killer dormant for 25 years, Ziba is pulled into the hunt for the perpetrator. As the body count rises, it becomes clear he’s on a new spree. But what’s brought the London Lacerator back after such a long hiatus? And does his sudden return have anything to do with the woman on the train? Ziba scrambles to profile the killer in the hope of predicting his next move. But time is running out.