Mysterious and unearthly deaths start to occur while Professor Saxton is transporting the frozen remains of a primitive humanoid creature he found in Manchuria back to Europe.

In 1916, during the Mexican Revolution, General Pancho Villa manages to escape from the clutches of General Goyo, his greatest enemy, only to face an even greater problem when he meets McDermott, a mysterious adventurer who promises to get him weapons and ammunition for his troops.