Girona, Spain, 1353. The blind physician Isaac battles a plague epidemic that has swept through the city. Soon he learns that the plague is not the only misfortune threatening the residents. In the public baths, they find the body of a nun, who turns out to be disguised as the queen’s servant. Even the Bishop of Girona himself turns to the respected Isaac for help in uncovering the circumstances of this strange death. The investigation leads Isaac to a ruthless plot aimed at destroying the Spanish monarchy…