A gang of professional art thieves, a plot of corruption, and secret sects are the elements on which this story of humor and intrigue is built.

Upon discovering the theft of the apostles’ relics from the crypt of Santiago de Compostela Cathedral, the Church decides to investigate in secret. Liberto, a close collaborator of Bishop Adolfino, takes charge of the operation and hires Professor Cosme Durán, a leading expert on the tomb. From there, the investigations begin, leading them to different points along the Camino de Santiago and even into Portugal.