Every year for ten years, a young woman's body was found in Edinburgh at Christmas naked, throat slit, body washed clean. Ten years, ten women. The final victim, Kirsty Summers, was Detective Constable Tony McLean's fiancée. But the Christmas Killer made a mistake. In a cellar under a shop, McLean found a torture chamber and put an end to the brutal killing spree. Twelve years later, and a fellow prisoner has just murdered the incarcerated Christmas Killer. But with the arrival of the festive season comes a body. A young naked, washed, her throat cut. Is this a copycat killer? Was the wrong man behind bars all this time? Or is there a more sinister, frightening explanation? McLean must revisit the most disturbing case of his life and discover what he missed before the killer strikes again . . .