Estevar Borros, one of the legendary sword-fighting magistrates known as the Greatcoats and the king's personal investigator of the supernatural, is no stranger to tales of ghosts and demons. When the fractious monks of the abbey rumoured to be the birthplace of the gods begin warring over claims of a new pantheon arising, the frantic abbot summons him to settle the dispute. But Estevar has his own problems: a near-fatal sword wound from his last judicial duel, a sworn knight who claims he has proof the monks are consorting with demons, a diabolical inquisitor with no love for the Greatcoats, and a mysterious young woman claiming to be Estevar's ally - but who may well be his deadliest enemy.