King Henry IV sends the Chevalier de Pardallan on an important mission to Spain, a country ruled by the despotic fanatic Philip II. At the same time, the insidious princess Fausta arrives in Spain: she brought King Philip a document giving him the right to the French throne. In an effort to get this paper, Pardallan goes through many trials, encounters executioner monks, falls into mysterious traps, passes through the mysterious labyrinths of palaces leading to torture chambers, and witnesses the horrors of the Inquisition. Who will win the next battle between the Chevalier de Pardallan and the powerful Fausta - princess of the Borgia? On Fausta's side is the all-powerful Inquisition... On Pardalian's side - only a few friends and a faithful sword...