After several elaborate Republic western vehicles, William Elliot returns to the clean-cut minimalism of his "Wild Bill Elliot" days in Longhorn. The story involves the efforts by cattle rancher Jim Kirk (Elliot) to cross-breed his Longhorn cattle with Hereford stock, thereby increasing their value. To this end, Kirk heads to Oregon to pick up a prime group of Herefords. Unfortunately, his head cowboy Andy (Myron Healey) is in cahoots with a gang of rustlers who intend to steal Kirk's improved stock. Featured in the cast are all-purpose heroine Phyllis Coates and such sagebrush veterans as I. Stanford Jolley, William Fawcett, Zon Murray, and future TV "Lone Ranger" John Hart.