Just after World War II, American Steve Pitt (Sterling Hayden) seeks out Father Paolo (David Leonard) at an Italian village. A new priest tells him Paolo was executed by the Germans. Steve recalls the events of 1944, when as a fighter pilot in Corsica, he flew on a last mission over Italy because his friend Captain George Peterson failed to complete his assignment: to blast a tunnel leading to a German ammunition dump. Steve is shot down, however, and parachutes into enemy-held Italy. Getting help from Nina (Joy Page), a young Italian partisan, she brings him to Bruno (J. Carrol Naish), the local partisan leader.