A glamorous brothel in Nazi-occupied Paris becomes a popular attraction for the SS Officers, but the beautiful prostitutes within the compound are not what they appear to be. The girls are actually working for the Resistance, gathering data from their unsuspecting German clients and forwarding it to the Allies.

Julien, the son of a minister has just married Birgitt, a Swede she met during her holidays on the French Riviera. She was recovering, having come to rest with Julien's father, a friend of her family. During the wedding cocktail, Julien remembers these holidays.