General Von Klinkerhoffen thinks that a mixed marriage between a Frenchwoman and someone from the occupying forces would provide a good propaganda piece for the newspaper. He decides that Captain Bertorelli should marry Edith. A party is arranged at... (more) the chateau so that local dignitaries can meet the 'happy couple'. The RĂ©sistance rescues the airmen from the chateau via an underground river. The airmen end up stuck in a sewer underneath the town centre.