During the Third Crusade in Palestine, the heroic knight-errant Prince Killian is entrusted with a sacred mission: to retrieve the Holy Grail from the clutches of an evil lord. Killian, with the assistance of his loyal sidekicks -- clever young Crispin, portly Goliath, and the beautiful Viking Princess Sigrid of Thule -- must leap into action in order to reclaim the Grail, and possibly turn the tide of the Crusades!