Raul Mackenzie-Mendoza is the mixed-blood son of a Scot-American father and a Mexican mother. He is an adventurer who speaks two languages and can back up anything he says in either one with his sixgun. He is hired by a desperate Arizona rancher to rescue his niece from the Mexican bandit El Demonio. At first it seems a routine job of finding the bandido then ransoming the beautiful captive. But El Demonio has sold the young woman to traffickers of human beings. Now bringing her back will become a hunt-and-escape adventure challenging Raul's courageous determination and his gunfighting skills.