Murphy is the sole survivor of his crew, that has been massacred by a German U-Boat in the closing days of World War II. He is rescued, and ends up at a forgotten mission station near the mouth of the Orinoco, and begins to plot his vengeance. He wishes to sink the U-Boat by means of any method imaginable to him, and sets about to make the courageous attempt, assisted by Louis, the administrator of the local oil company.

Peter O'Tooleas Murphy
Siân Phillipsas Hayden
Philippe Noiretas Brezan
Horst Jansonas Lauchs
John Hallamas Ellis
Ingo Mogendorfas Voght
George Roubicekas German Submarine Crewman (uncredited)
Bob Simmonsas German Submarine Crewman (uncredited)
Douglas Slocombe