James Stewart (Mace Bishop) and Dean Martin (Dee Bishop) star as outlaws in Bandolero. The film begins as Dee Bishop (Martin) and his gang are about to be hanged. The Scripture-spouting executioner turns out to be Dee's brother Mace (Stewart), who helps the desperadoes escape. They are pursued by a sheriff (George Kennedy), whose lady friend (Raquel Welch) is infatuated with Dee. The brothers try to go straight, but before they can make up their mind they find themselves surrounded by Mexican bandidos and are forced to team up with the sheriff to fight them off.