Hochmut kommt vor dem Knall.

Under political pressure, a West German radio station stages a radio play about a Russian invasion of West Germany. A handsome fee convinced the unemployed Anton Wiesel to take on the direction. At the same time, the driver Harry Kyritz received an inheritance: a decrepit barge with which he intends to become an entrepreneur. His acquaintance with Madeleine Müller, the daughter of a coal wholesaler, comes at just the right time. But so does Mr. Müller, because he is broke. So he throws a big party to sell his daughter as his last profitable asset. Harry has a good chance when the radio plays a radio play about a Russian robbery. The guests take it as a factual report and flee to the cellar. Harry reveals his true financial situation, but Müller accepts him anyway - as a model worker for the Russians. But when the mistake is revealed, Harry is out of the running in favor of a wealthier son-in-law.