For years, the Stranger House has stood in the village of Illthwaite, offering refuge to travellers. People like Sam, a brilliant young mathematician, who believes that anything that can't be explained by maths isn't worth explaining. And Miguel, a historian running from a priests' seminary, who sees ghosts. Sam is an experienced young woman, Miguel a 26-year-old virgin. But both want to dig up bits of the past that...
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.