Spain, Girona, 1353. Blind doctor Isaac fights a plague epidemic that has engulfed the city. But he soon learns that the plague is not the only scourge threatening the inhabitants. The corpse of a nun is discovered in the public baths, who turns out to be the queen's handmaiden in disguise. The Bishop of Girona himself turns to the respected Isaac for help in clarifying the circumstances of this strange death. Isaac's investigation leads him to uncover an insidious plot aimed at destroying the Spanish monarchy. Caroline Rowe is the pseudonym of Medora Sale, a specialist in medieval history and the author of a series of historical detective stories about the investigations of the blind doctor Isaac from medieval Girona.