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Mild-mannered German bank clerk Lutz Kobin (Hermann Speelmans) yearns to live a life of adventure. He gets his wish sooner than he expects when a mysterious character commits suicide. This leads Kobin into a Byzantine plot to separate several valuable works of art from their rightful owners. Our hero's exploits whisk him from Berlin to Prague, where he must protect his wife Monika (Dorit Kreysler) from the evil machinations of criminal mastermind Count de Bary (Walter Steinbeck). Complicating matters is Kobin's best friend Kurt (Fritz Obemar), who also has designs on the toothsome Frau Kobin.