Twelve years after he left Peterborough under a cloud, DI Bliss returns to the city and the major crimes team. Having spent years policing organised crime, Bliss is plunged straight into the heart of a serial murder investigation. Meanwhile, Penny Chandler has been promoted to DS and has been working in. London on the Met's sexual crimes team. But when two rapes are reported on her old patch in Peterborough, Chandler volunteers to interview the victims. Chandler joins the hunt for the attacker and soon notices a possible link between the rapes and Bliss's murder investigation. Could the same man be responsible? Just as both cases seem to stall, a call comes in from an ex-policeman who knows of unsolved cases in the USA with a similar MO. Bliss finds himself travelling to California to hunt for a killer whose reach may have stretched further than anyone could possibly imagine. But in order to catch the murderer, Bliss must discover the killer's motive. A motive which should have remained buried in the past...