In the waning days of WWI, a U.S. "Mystery Ship," sets sail for the coast of Spain towing a submarine. Their mission is to find and sink a U-boat that has been especially effective in attacking Allied shipping. Posing as a harmless schooner, the mystery ship is in fact fitted with a formidable gun capable of sinking a U-boat. Stopping in the Canary Islands to refuel, the crew interacts with locals involved with Germans, and with Germans themselves, including the sister of the U-Boat commander, who is lurking offshore waiting for the coming battle.

• DirectorJohn Ford
• Release30 January 1931
• Genre
  Action / Drama
• Duration1h 30m
• Budget?
• Revenue?
• Rate
  

  4.875
  8 reviews
• Productions

  Fox Film Corporation