Alice Ascher, a poor, elderly shopkeeper, is murdered in Andover. Betty Barnard, a young waitress, is strangled with her own belt at Bexhill-on-Sea. Next comes Carmichael Clarke, collector of Chinese art, clubbed to death in Churston. Only in Doncaster does the pattern vary: the man found stabbed in the Regal Cinema is called George Earsfield.
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.