Tex Houston (Johnny Mack Brown), famous Indian scout, finds a Pony Express Rider dead on the trail, killed by renegade Indians. He decides to take the rider's mailbag into town, where he meets Mary Grant and her father, terrorized by ruthless Bart Eaton, who is intent on wedding Mary and stealing her brother's gold mine. It's up to Tex to ward off renegade Indians and rival outlaw gangs in order to save Mary and her brother's gold.
