The failed suicide of a women called Gemma who has been raped 12 years ago, when she was just a girl by two men, causes Boyd and his team to re-open the investigation. But as the previous investigation went nowhere there aren't any leads left to start from.

Eventually new forensic evidence leads Boyd and the team to one of the rapists of Gemma. Now the hunt is on for his partner, which becomes as race against time as Gemma might have own ideas on justice.

Boyd has to break in a new team member of equal rank, Detective Superintendent Sarah Cavendish, a high-flyer recently grounded by a hushed-up failed operation.After the empty and abandoned car of banker Donald Rees is discovered threee years after he went missing, Boyd decides to take on the case in an effort help the man's family find some closure with their lives.

Boyd is convinced that the missing Donald is not a murderer, and pushes his team to try to make sense of all the vague connections in the case and eventually confront the unfathomable evil lurking within the heart of this sad, unfortunate family.

As the case continues, the squad investigate Murray using Grace as bait. However, when one member is shot and one member is arrested, the case could go in to turmoil, only for a connection to be revealed.

Boyd needs Sarah's expertise to help expose the state's involvement in Barclay's death.

Boyd investigates the disappearance of 16 homeless boys from Waterloo Bridge in the 1980s.