After having challenged the German Ottone to single combat for the hand of Leonza, the bishop's niece, the valiant knight Anselmo da Montebello, leaves for Rome where he must deliver a precious relic to the Pope and obtain a sum of twenty-thousand crowns in order to participate in the third crusade in the Holy Land.
A frustrated Frankfurt innkeeper is recruited as an agent for the "Gehlen Organization" and after a short training period, during which he is familiarized with sophisticated espionage methods, he takes his first steps as a spy.
After a peaceful sailboat ride, four young people, including rich kid Bill, Joe, Fred and Jane, knock on the door of a secluded villa after their dune buggy runs out of gas.