Garrison's mission is to discredit one of Hitler's trusted Generals by making it appear he's been selling information to the Allies. He hopes to do this by exploiting his weaknesses one of which is women so he brings in a female con artist known as the Duchess. And his other weakness is gambling. And he's going to do that in Cannes so Actor and the Duchess pose as an Italian couple. Problem is the owner of the casino recognizes her and threatens to blow the mission unless they eliminate his competition.