Madrid, winter of 1620. The happiness of the marriage formed by Sebastián Castro, a renowned clerk of the Villa, and Margarita Carvajal staggers when both become the main suspects of a blood libel: lawsuits that blame the Jews for sacrificing Christian children to collect their blood and whose jurisdiction belongs to the Holy Inquisition.

With the bonfire hanging over them, their son Alonso, a thirteen-year-old boy, begins a desperate search for a way to save them, a purpose that tears her out of her warm existence and shows her the ice of life.

In spite of everything, three headlights turn on light in the shadows of her misfortune: friendship, hope and a dream.

Friendship is provided by Juan and Antonio, two rogue vagabonds. Hope beats in a bag full of money that seems to be pulling the strings of destiny. And the dream awaits him in college, where he plans to study law, become a lawyer, and exercise a law capable of preventing innocent people like his parents from suffering the rigors of injustice.

Blood Libel is a fascinating story of love and friendship set in Madrid during the Golden Age, a vibrant but bleak time in which, while faith in God lit hearts, crimes against it lit bonfires.