During the World War II, two British army officers, Garnett and Gowan, together with Private Clark, who used to live in France and ran a café with his French wife, and Raoul, a member of the Free French forces, are dropped off on the coast of occupied France. Their mission is to collect intelligence on German military strength in the area, prior to an airborne raid. They rendezvous at the chateau used as German headquarters, which is Raoul's ancestral home. His sister Michele still lives there, but is resigned to cooperation with the occupiers, and is too frightened to assist in the men's mission.