Early 20th century, Arizona... Master Byron Peck, British citizen and business lawyer, escorted by his sidekick, the frightening Mr. Hoggaard, travels the barren and burning stone desert in search of a mysterious paper that could change the course of the history of the United States of America forever. For the same purpose, the dangerous Margot de Garine joins forces with a band of lawless Mexicans... And they will be merciless!