The fourth book in the Detective Superintendent Jock Anderson crime series. A fast-paced novel set, as are the other books, largely in the Highlands of Scotland. Jock and his team are on the hunt for a sadistic multiple rapist and serial murderer. Although there are few clews, and the trail goes cold, new clues emerge from the outcomes of apparently unrelated crimes, setting Jock back on the hunt, leading to the final apprehension of the killer.