The beloved comic book character returns, staying with the Wilsons, George and Martha, while his parents are away. Despite driving Mr. Wilson mad, the young boy's enthusiasm is misdirected, as he tries to assist the town's thief.

Dennis the Menace
Dennis's efforts to assist the Wilsons during his parents' absence lead to a series of chaotic events, as a cunning thief arrives in town, and Dennis's good deeds unintentionally facilitate the thief's escape.