A British naval officer has a brief affair with a woman in England and never knows that she bears him a son. 20 years later the boy is on a ship under his command when he is tracking a German Raider. When the boy is captured after his ship is sunk, he finds a way to slow the German's progress while a lethal hunt for him goes on.

• 20th Century Fox
• Jeffrey Hunter
• Michael Rennie
• Wendy Hiller
• Bernard Lee
• Victor Maddern
• John Horsley
• Patrick Barr
• Robin Bailey