Sara Linton, medical examiner in the small town of Heartsdale, is called out to an apparent suicide on the local college campus. The mutilated body provides little in the way of clues - and the college authorities are keen to avoid a scandal - but for Sara and police chief Jeffrey Tolliver, things don't add up. Two more suspicious suicides follow, and a young woman is brutally attacked. For Sara, the violence strikes far too close...
The first message sent to Tom Thorne's phone was just a picture - the blurred image of a man's face, but Thorne had seen enough dead bodies to know that the man was no longer alive. But who was he? Who sent the photograph? And why? While the technical experts attempt to trace the sender, Thorne searches the bulletins for a reported death that matches the photograph. Then another picture arrives.