West of the Brazos

Battlin' Back To Back... for the riches of a rangeland empire.

Returning to see his mother, Shamrock gets into a gunfight and afterwards the wounded Marshal gets him to take his badge and assume his identity. He arrives to find his mother has died, oil has been discovered on her ranch, and a man impersonating him is about to be declared the heir. In court, not only does the fake heir win but Shamrock is arrested for impersonating an Officer.