How do you investigate the murder of a woman without a life? Thatâ€™s the challenge facing Detective Constable Ben Cooper and Detective Sergeant Diane Fry when a reclusive agoraphobic is found shot to death in her home. For a woman with no friends, no family, and virtually no contact with the world, someone took an exceptional amount of care executing her murder. At nearly the same moment, a raging house fire claims the life of a young mother and two of her children. But troubling questions remain in the ashes. Among them, how did the fire start and where was the husband at two A.M.? As the two cases begin to converge, a horrific possibility takes shape. A killer is stalking the Peak District whose motives are a mystery and whose methods are unpredictable. And his next victims could be the only two cops who can stop him.