For DI Declan Walsh, life is finally returning to normal. Finding a home at DCI Alexander Monroe's Last Chance Saloon Crime Unit, Declan and his team; DS Anjli Kapoor, DC Billy Fitzwarren, Doctor Rosanna Marcos, and her assistant DC Joanne Davey are still recovering from the fallout connected to their most recent case, while Declan is cleaning out his late father's home in order to move in.
But when Declan's old mentor, now terminally ill with cancer, confesses to a gruesome murder, on the condition that Declan himself takes on the case, Declan and his colleagues find themselves in a race against time to find the real killer before a violent gang war breaks out over it.
But another witness appears, claiming that he knows where Angela's body is buried; in the process revealing another body in Birmingham, identical in every way—including DNA, tattoos, and long repaired skiing injuries.
Now, with both North London and South Birmingham becoming battlegrounds and with vendettas reaching boiling point, Declan Walsh must delve back into the world of Johnny and Jackie Lucas, the East End "Twins" as he tries to discover how one victim can have two identical bodies.