Peter Diamond, head of Bath CID, takes a city break in Vienna, where his favourite film, The Third Man, was set, but everything goes wrong and his companion, Paloma, calls a halt to their relationship. Meanwhile, strange things are happening to jobbing musician Mel Farran, who finds himself scouted by methods closer to the spy world than the concert platform. The chance of joining a once-famous string quartet in a residency at Bath Spa University is too tempting for Mel...
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.