Cattlemen near the town of Sundown in the 1870s were at the mercy of unscrupulous cattle-buyers who controlled the market because of the difficulty in shipping from the West. Tex Jordan and his two friends, "Third-Grade" Simms and "Chihuahua" Ramirez, arrive with their herd to find that cattle-buyer Jack Hatfield forcing the sale of a rancher Andy Craig's cattle at below-market prices. Later, Craig is murdered by one of Hatfield's henchmen, and Jordan and his friends become foster fathers for Craig's young daughter "Little Jo." With the aid of the state governor and Lis Carpenter, the sheriff's daughter, the trio establish a Cattleman's Co-Operative Exchange, thusly enrage Hatfield. Then Hatfield and his henchmen begin to stampede the herds of the small ranchers resulting in their reluctance to sell their cattle through the Exchange. Unknow to Tex and his friends, the governor's secretary, Albert Wilkes, is working for Hatfield and is tipping him off to their plans. As a counter-move, "Chihuahua" pretends to quarrel with Jordan and becomes a member of Hatfield's gang.
—Les Adams <longhorn1939@suddenlink.net>