The illegitimate son of the King of Castile, Ramiro, receives a delicate mission from his father. After escorting two pilgrims to Santiago de Compostela, he is to acquire a legendary treasure, an inheritance of the Visigoths, which has already been saved multiple times from the greed of the Moorish invaders. The brave young man is accompanied by the squire Jos, whom he takes along on long rides through the Spain of King Alfonso VIII. The historical masterpiece by William Vance ("Bruce J. Hawker") is finally available in German as a complete edition, including additional material.