DI Bliss attends the aftermath of an apparent murder-suicide – but the scene tells him and his colleagues something very different occurred. Now the Peterborough Major Crimes Unit face an adversary like no other.

They have no idea why his victims had to die. They have no idea who he is. They have no idea where he might strike next – only that he will.

But while the killer is cunning, leaving no evidence for them to find, his biggest mistake might be in underestimating the team now hunting him. Because when Jimmy Bliss is on the case, all bets are off.