In 1930's Texas, the oil industry is booming and small-time wildcatter Bill Dodd has secretly acquired the oil lease to the property adjoining H.L. Hunt's latest gusher. It promises to make Dodd a millionaire but before he can register the leases with the county, he is gunned down and Hunt's company takes over the land. Texas Ranger Lee Garrett is sent to investigate. He uncovers the first organized crime racket in Texas. The Mafia is running women and booze and their hired muscle makes sure no one stops their operation.