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 local oil company Administrator.

The Apaches are on the warpath and the Army must defend them. Murphy’s mission is to get a shipment of rifles, but it’s stolen by greedy white traders with the help of mutinous soldiers