Growing up in a London family with ties to organized crime, Detective Constable Cat Kinsella knows the criminal world better than most cops do. Working their latest case—their third, after Stone Cold Heart—Cat and her partner Luigi Parnell discover the remains of Holly Kemp, allegedly the last victim of serial killer Christopher Masters. Although Masters was apprehended years ago, he never confessed to this killing, and now Cat has the proof that he did it. Or does she? As Cat and Parnell look closer, they find discrepancies that raise troubling questions, and now they are in the sights of someone who will do anything to keep past secrets hidden.