Ten years after the body of a mutilated girl was found in Yorkshire, another young girl is missing. Lawyer John Piggott (Mark Addy) is asked to re-examine the conviction of a disabled man who confessed to the earlier murders and now claims he dis so under intense police pressure. As Piggott looks into whether the Yorkshire police tortured their suspect, Detective Jobson (David Morrissey) starts to regret his brutal past and reveals a secret that casts the entire case in a new light.