The two half-orphans Reni and Rolf are 13 and 10 years old and they live with their grandmother in Berlin. Their father has died during the war, their mother works at a Baltic Sea port. Here she meets a captain who wants to marry her. When their mother tells them about the planned wedding, Reni and Rolf are reluctant to meet the captain.
Kapitän Franz Müller
Michaela Gast
Großmutter Gast
Reni Gast
Rolf Gast
Koch Albert
Steuermann Krüger
Maschinist Berndt
Dr. Stammler