The rangers -- Tex (Dave "Tex" O'Brien), Jim (James Newill), and Panhandle (Guy Wilkerson) -- are this time en route to Boulder City to investigate the murder of rancher Dan Clark when they happen upon Trigger Farley (Reed Howes), a gunslinger hired by Cole Melford (Jack Ingram), the chief suspects in Clark's murder. Tex assumes Trigger's identity and Jim impersonates Tom Bancroft (Kenne Duncan), the heir to Clark's estate. After a bit of confusion concerning Ellen Clark (Christine McIntyre), the other Clark heir, the rangers get their murderer and the two heirs discover that the ranch contains a secret mine.