In a saloon in a Mexican border town, a group of cowboys, including a Mexican named Pedro, play poker. One man is discovered cheating, and is shot dead by Pedro, who is wounded as he attempts to escape. Pedro is followed home by the local sheriff, who proves the next victim of Pedro's quick temper and pistol. Pedro's wife, Juanita, is thrown into jail, but he manages to break her out. They head for the border, unaware that a posse is waiting for them.