A young Parisian woman begins a sordid affair with a middle-aged American businessman who lays out ground rules that their clandestine relationship will be based only on sex.

Kitty runs a brothel in Nazi Germany where the soldiers come to “relax”. Recording devices have been installed in each room by a power hungry army official who plans to use the information to blackmail Hitler and gain power himself. A girl named Margherita discovers the little ploy and with Kitty’s help plans to take on the dangerous task of exposing the conspiracy.