Living in Toledo, Spain, and raised a devout Catholic, Isabel cannot know her privileged life is about to unravel. The tolerant society she is used to has been turned upside down by the Spanish Inquisition and the Grand Inquisitor, Torquemada. Now even the walls have ears, and no one is immune to rumor, suspicion, a resentful servant, or a neighbor bearing a grudge. Still, Isabel feels safe from the burnings and torture. After all, her father is a respected physician in the court of King Ferdinand and Queen Isabella. Then Isabel is betrothed to an abusive man she thoroughly dislikes, and for the first time, her doting parents are united against her. The reason becomes all too clear when they reveal to her their family's Jewish roots. By marrying their only child into a respected old Catholic family, they hope to protect her and dispel any suspicion that they have not always been devout Christians. Despite their efforts, Isabel's father is arrested and tortured by the Inquisition, and it's up to Isabel to concoct a desperate plan to save his life - and her own.