London's elite murder squad is back as DI David Bradford (Hugo Speer, Father Brown) leads a team of detectives solving the city's worst crimes. But Bradford remains haunted by the disappearance of his wife, Sarah, months earlier. His forthright subordinate, DS Vivienne Cole (Sharon Small, The Inspector Lynley Mysteries), thinks his account of events doesn't add up, and when her colleague DC Rob Brady (Bailey Patrick, Bodyguard) drops a bombshell about the night Sarah went missing, the two start their own investigation.