The western town of Mesa City, Ariz., is a haven for a ruthless gang of cowboys, led by the villainous Joe Brooke (Dennis Moore). Buck Roberts (Buck Jones), a retired gunslinger, is wrangled back into action to fight back against Brooke and his boys. But Roberts will not face them alone. His gang of Rough Riders -- the Rev. Tim McCall (Tim McCoy) and Sandy Hopkins (Raymond Hatton) -- are ready and willing to help Roberts kick Brooke out of town for good.