Some wounds never heal . . .
Henry Christie has never forgotten the day he was brutally assaulted as a young constable while chasing a teenage shoplifter down a Blackpool alley. Tommy Benemy went missing soon after his arrest, but although Henry promised Tommy´s mother he´d keep an eye on the case, her son was never found.
Now retired, Henry reluctantly agrees to join the Cold Case Unit as a civilian investigator, teaming up with the volatile DS Debbie Blackstone, who´s carrying scars of her own. When an old case leads them to a serial rapist, and a gruesome scene takes Henry back to his old promise - and failure, the pair find themselves confronting their demons as they unearth a deadly criminal conspiracy spanning decades, and chilling secrets desperate individuals will go to any lengths to keep hidden.