An edge-of-your-seat psychological thriller that sees Dr Tony Hill and DCI Carol Jordan facing the toughest challenge of their careers. A new murder scene bears horrific resemblance to a series of murders two years ago - murders that ended when irrefutable forensic evidence secured the conviction of Derek Tyler. But he has been locked up in a mental institution since his trial, barely speaking a word. So is this the work of a copycat? All his years of experience tell top criminal pathologist Dr Tony Hill that it isn't. While Hill tries to crack Tyler, DCI Carol Jordan and her team mount a desperate undercover operation to trap the murderer, a decision that will have terrible consequences.