Sailors Jochen, Carlo, and Blacky sign on to an old steamboat. It's a good thing Blacky oversleeps the ship's departure. This allows him to track down a gang of criminals. Their boss is planning an insurance fraud and wants to blow up the ship and its crew.

• Karin Baal
• Joachim Hansen
• Horst Frank
• Carlo Giustini
• Ugo Sasso
• Luisella Boni
• Carmela Corren
• Mario del Marius