Rumours of plague threaten Cambridge again, ten years after the Black Death had almost laid waste to the town. It is a ripe atmosphere to be exploited by the mysterious 'Sorcerer', an anonymous magician whose increasing influence seems certain to oust both civil and church leaders from power. One murder, another unexplained death, a font filled with blood, a desecreated grave - all bear the hallmarks of the Sorcerer's hand, only the identity of the magician remains a mystery. The latest episode in the popular series of mediaevel mysteries, featuring the physician-cum-sleuth, Matthew Bartholomew.