Hogan's only chance to pass some important information of to an underground contact is via a rendezvous in a nearby village --- So he convinces Colonel Klink that he will reveal valuable military secrets if he's allowed to have "a night on the town."

Can Hogan locate the secret German air base commanded by a World War I flying ace known as the Blue Baron? Yes --- by convincing Colonel Klink to throw a party for the famed aviator.