On an evening in the latter part of May a middle-aged man was walking homeward from Shaston to the village of Marlott, in the adjoining Vale of Blakemore, or Blackmoor. The pair of legs that carried him were rickety, and there was a bias in his gait which inclined him somewhat ...
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.