Sgt. Ernie Bilko is the ultimate con man. He runs the motor pool at a small Kansas US Army Camp. Colonel Hall, nominally in charge of the base tries to keep Bilko's plans in check. Bilko runs every money making scheme that he thinks he can pull off. Midnight cruises on Landing Craft, Tank Rides, Poker games, and an interesting deal with local service stations for spare parts for jeep tires.
Morgan Twinhazy, a friend of Bilko's, now works at Butterworth. Butterworth and Butterworth on Wall Street, New York. Ernie visits him thinking he's some bigshot. But he finds a downtrodden employee on just $42 a week. Bilko takes his career in hand and soon Twinhazy's career takes off.