The famous pilgrimage route Camino de Santiago becomes the setting for vengeance by two brothers and a former Basque terrorist. Their killings frighten villagers and interrupt the pilgrimage of FBI Agent Ward Crimmons, who is walking the Camino in memory of his deceased wife, along with his brother-in-law, a general in Spain's famous Civil Guard. As victims multiply and Spanish police search for clues, Ward learns some of the country's dark history...