

A secret military document is mistakenly hidden in Colonel Klink's topcoat at a party, and a desperate Hogan must nab the document because of both its value to the allies, and because Klink will be charged with treason and replaced at Stalag 13 if it is discovered in his possession.
A German oil refinery is so heavily protected that allied bombers have been unable to destroy it. So, Colonel Hogan decides that the only way to fool the gunners is to use a German plane.