When policewoman Eva Perry goes deep undercover to help bring a vicious local crime ring to justice, both she and her boss - Chief Detective Inspector Beverley Wharton - know there are huge risks involved. A series of unexplained and bizarre suicides forces Beverley into close contact with her former lover, the renegade forensic pathologist John Eisenmenger, who is already investigating the sudden suicide of his colleague Daisy Pemberton.

Eisenmenger conducts autopsies on the victims and discovers all their deaths are linked by their earrings. When he convinces Beverley to pursue the trail of the earrings, they become enmeshed in a frightening web of mental manipulation that brings them to the edge of being the instruments of their own violent deaths.