When ex-police officer John Cone is found lying wounded in a room full of dead bodies, he has a terrifying story to tell. Three days earlier he was hired by a mysterious client to snatch a suspected serial killer, Andrew Kent (aka the Penthouse Predator) from custody while he's being transferred between prisons. But having seized Kent, things immediately go badly wrong. People start dying, Kent goes missing, and Cone begins to realize that the case against Kent may not be so cut and dried as he was led to believe. Someone else who shares that suspicion is newly promoted, DI Tina Boyd. She was one of the Murder Squad team who'd arrested and charged Kent several months earlier. A few hours before he was snatched, Kent had called Tina claiming he had highly important information about a murder, but refusing to divulge what it was on the phone. And now he's gone, and Tina has to find him. And find him fast, because it's clear some very high-powered people want to silence him.