Un frère sauve son frère cadet de la pendaison. Un shérif les poursuit jusqu'à la frontière mexicaine, où tout le monde doit affronter les redoutables bandoleros.
Posing as a hangman, Mace Bishop arrives in town with the intention of freeing a gang of outlaws, including his brother, from the gallows. Mace urges his younger brother to give up crime. The sheriff chases the brothers to Mexico. They join forces, however, against a group of Mexican bandits.