Fargo was making good money running guns across the border to Pancho Villa. He didn't give a damn about the Mexican Revolution, as long as the money was good. Then a dangerous Mexican-Irishman named Carlos O'Brien and a good-looking El Paso saloon girl came along and Fargo found himself facing a firing squad armed with his own guns. After that he had to fight his own bloody war in the middle of the revolution. Even for Fargo, it was the toughest chore he ever had to face.