Peter Diamond, ex-CID and notoriously difficult to work with, is sacked from his latest job as a security guard in Harrods. Doggedly he turns his sleuthing skills to unravelling the mystery of a little Japanese girl abandoned in London. Naomi, as she is known, exhibits the classic symptoms of an autistic child.
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.