A French animal lover protects a dog and a mouse wanted by Soviet scientists for their space program.

Arbella is a charming village in Corsica. It's such a pleasant place to live that Monsieur Lauriston has decided to spend his old age there with his wife Marthe. Encouraged by Giuseppe, the owner of the Napoleon bar, he is promoted to mayor. This brings him the wrath of Captain Bartoli, owner of the Café Bonaparte, a self-styled pirate and navigator who has long aspired to this honorable position. Further complications arise when Lauriston's nephew romances Antonia, the daughter of Amoretti, the last bandit of honor in the area and the town's main tourist attraction.