When a close colleague is brutally attacked, Inspector John Rebus is drawn into a case involving a hotel fire, an unidentified body, and a long forgotten night of terror and murder. Pursued by dangerous ghosts and tormented by the coded secrets of his colleague's notebook, Rebus must piece together the most complex and confusing of jigsaws. But not everyone wants the puzzle solved - perhaps not even Rebus himself...
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.