Female students are going missing but nobody’s noticed yet. A body is found in a car crash, but the victim was already dead . . . Police partners, D.I. Calladine and D.S. Ruth Bayliss race against time to catch a vicious serial killer. The first two victims are American university students and both have livestock tags fixed to their earlobes. Who wanted them dead and what’s the connection? The detectives piece together the forensic evidence and track down the witnesses, to reach a shocking conclusion.