The headquarters of the Marshal Tito's Liberation Army are surrounded by Axis forces. The Partisans have no choice but to fight their way out of the encirclement and face the enemy on the plains of Sutjeska.

Beautiful housekeeper Babette travels to England after the Nazis invade France. There, British intelligence devise a plan for Babette to sneak back home, where she could use her feminine charm on key Nazi officer Schulz, gleaning valuable information for England. However, Babette, although willing and spirited, is naïve and untrained, making her less than ideal for matters of national security.