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