Martin "Stonewall" Gregory owns nearly 1,000 acres on which he raises his horses. Bently and Shane, two easterners, represent a large oil company. They have been sent to offer Stonewall $10,000 for an oil lease on his north 100 acres. The Lone Ranger believes it is in Stonewall's best interest to accept their offer, however Tonto has discovered that they intend to cheat Stonewall. Can the Lone Ranger thwart their plan?