Läppli, a customs officer in Switzerland, gets involved in a humorous adventure when he discovers a smuggling ring operating at the border.

Theophil Läppli is a swiss patriot, who after a trip to Greece tries to recover the democratic roots of Switzerland. With much enthusiasm and idealism he's discovering, that corruption and greed are wide spread in his beloved country. This is the second movie about Theophil Läppli after HD-Soldat Läppli (1959).

HD Soldier Läppli is a comedy movie set in Switzerland, centered around a foolish Swiss soldier named Läppli. The film is a satirical take on military life and follows Läppli's misadventures during an exercise. With a touch of comedy and satire, the movie showcases the quirky and humorous side of the Swiss army. It also features a cat, a canary, and a comedian, adding more fun elements to the story.