Monte is a hapless bumbler in love with a police sergeant's daughter, who says no to their marrying until Monte shows he can get a responsible job with a uniform. He gets one as a ship's orderly on a Dayliner, but tells his prospective father-in-law he's the Captain. They all show up on the ship, and Monte must keep the real Captain locked up, away from his fiancée and father.

"An average American family", the Middletons, visit the 1939 World's Fair and witnesses the advent of future technology, encountering robots and dishwashers for the first time.