John Wayne attempts to locate Shirley Jean Rickert's wayward father in this low-budget Western from his days with Monogram. The little girl, a "half-breed", is the heir to a 50,000-dollar Indian oil claim, but she needs the signature of her long lost father in order to collect. Chris Morrell, Nina's foster father, manages to get the tyke out of town before Sam Black (Yakima Canun) and his gang can get their grubby hands on her and her inheritance, but other villains learn of the girl's potential windfall, including express office robbers Vic Byrd (Jack Rockwell) and Jim Moore (Jay Wilsey). When Vic finally gets hold of the child, he is shot and killed by one of his own hands, Tom (Earl Dwire), who is revealed to be Nina's real father. With Tom's help, Chris manages to trick the Black gang and is able to storm their hideout. In the ensuing melee, Tom is fatally shot but Byrd manages to escape with Nina. Chris goes after them and there is a final confrontation in a raging river.