Luke Cromwell, aka the "Silver Kid" (Audie Murphy), loses his father to mining claim jumpers. He is deputised by Marshal Lightning Tyrone (Stephen McNally) of Silver City, who wants to defeat the claim jumpers. The two men fall for different women, Tyrone for the treacherous Opal Lacey (Faith Domergue), who is secretly in league with the claim jumpers, and Cromwell with tomboy Dusty Fargo (Susan Cabot) who pursues Lightning.