Synopsis by Hans J. Wollstein
In the opening chapter of Republic's The Painted Stallion, a mysterious Indian girl rider (Julia Thayer) on a beautiful paint uses whistling arrows as warnings of impending attacks by Indians or white outlaws. In Independence, MO, meanwhile, Walter Jamison (Hoot Gibson) is readying the very first wagon train bound for Santa Fe, NM. Along for the ride are Clark Stuart (Ray Corrigan), a United States representative headed for trade negotiations with the new Mexican envoy; Jim Bowie (Hal Taliaferro), the legendary inventor of the knife that bears his name; young Christopher Carson (Sammy McKim), a stowaway and wannabe scout whom Stuart nicknames "Kit"; and hillbilly cousins Oscar (Ed Platt) and Elmer (Lou Fulton). En route, the train is met by Bull Smith (Charles King), an envoy from the soon-to-be deposed Spanish lieutenant governor of New Mexico, Alfredo Dupray (LeRoy Mason), who is planning to sabotage the negotiations by substituting Clark Stuart with one of his own men. While Smith cunningly proposes to guide the train into Santa Fe, Dupray's aide, Zamorro (Duncan Renaldo), incites the Comanches to revolt. In the ensuing melee, Stuart is separated from the train but a whistling arrow from the Rider alerts him to the danger. The warning may have come too late however; thrown from his horse, Stuart finds himself right in the path of the attacking Comanches.