Dr Ethan Winter is one of the most gifted pathologists of his generation. He possesses an extraordinary analytical mind, capable of impeccable deductive reasoning which perfectly complements DI Lauren Bell, a meticulous, no-nonsense detective who is as driven as Winter when working on a case. Together they make a formidable team, as Winter's genius and insight into the victims is invaluable to Bell and her murder squad detectives.

Yet Winter is harbouring a secret. The unsolved murder of someone close to him still haunts his every move, and he's intent on unofficially investigating the death to bring the murderer to justice.