 Deputy Marshal Larry West (Don Barry) arrives in Rincon to investigate the murders of several ranchers. Blackie Mullet (Robert Lowery), leader of a gang working for the local land-and-water company, tries to convince Larry that the Indians are responsible for the killings, while Larry s old friend newspaper editor Amos Boling (Byron Foulger) and his assistant Polly Medford (Julie Adams as Betty Adams)tell him they suspect the land company and that Blackie is actually head of the infamous Dalton gang. Sheriff Jeb Marvin (James Millican) locks Larry up after he kills Missouri Ganz (Greg McClure) in self defense. Friendly Indians, led by Chief Irahu (George J. Lewis), free Larry and he goes on the trail of Blackie and the gang.