A young woman is unconscious, bleeding from a head wound. Hiding in the cellar is her husband, ready to wield a knife at anyone who tries to enter, desperate to protect his secret. What happens next leaves one of the officers dead, the other fighting for her career and Inspector Banks with a chilling murder investigation that will test him to the limit. The beauty and tranquility of England's Yorkshire Dales provides a striking and contrasting backdrop in this thrilling psychological drama that brings Peter Robinson's fictional detective to the small screen for the first time.