Delia Balmer, an agency nurse, met Sweeney, who confessed to killing his ex-girlfriend. He attacked her before evading capture. Balmer rebuilt her life to confront Sweeney seven years later after he was arrested for another murder.

The mysterious disappearance of a Scottish fishing trawler and a death onboard a Trident nuclear submarine bring the police into conflict with the Navy and British security services.

Set from 1965 into the 1970s, the show follows Endeavour Morse in his early years as a police constable. Working alongside his senior partner DI Fred Thursday, Morse engages in a number of investigations around Oxford.