When a man plummets to his death from a balcony at York races, his wife and brother become suspects in a murder enquiry. Meanwhile Richard is being stalked by a killer issuing death threats. Richard is reluctant to go to the police, for fear his own dark secret will be exposed. Newly promoted Detective Inspector Ian Peterson is investigating the death at the races when a woman's body is discovered. Shortly after that, Richard is killed. With three murders and no suspect, the investigation seems to be going backwards. Ian is determined to discover who is responsible. Afraid the detective is on his track, the killer abducts Ian's wife. Ian must solve the case to find her, before she becomes the next victim of a serial killer.