Gangster Looney McGann, who reads a Wild West magazine as he travels by train to Arizona, is excited to see from his window a man on horseback pursued by a group firing at him. After helping the man scramble onto the train, Looney opens a violin case to reveal grenades, which he and the man, Tom Daley, throw at the pursuers, who soon retreat. Impressed when Tom says he that he is known as "El Diablo," Looney offers to introduce him to his gang, but Tom is not interested. At the border, customs officer Pedro Gonzales learns that Tom, an American, broke up a wedding and stole the bride. He gathers an army of men and boards the train looking for Tom, who hides in the upper berth of a vacant room. Patricia Carter then enters and, after she tells Gonzales that she is alone, begins to remove her clothing until Tom knocks over a bag.