Ken Maynard's exceptionally intelligent horse, Tarzan the Wonder Horse, is the star of this western about evil cowboy Steve Frazer (Welch) who gathers horses for slaughter, whose meat is sold to pet food manufacturers. The wild horse Tarzan frees the doomed horses from their corrals, and Frazer convinces the Sheriff that Tarzan is a threat and can be shot on sight. Local cowboy Ken Benson (Maynard) and rancher Pat Riley (Kennedy) work together to clear Tarzan's good name and put Frazier behind bars for his evil deeds.
Ken Maynard
as Ken Benson
Merna Kennedy
as Pat Riley
Niles Welch
as Steve Frazier
Roy Stewart
as Henchman Butch
Kate Campbell
as Aunt Martha
Bob Kortman
as Henchman Spike
Nelson McDowell
as Cowhand Slim
Jack Rockwell
as Sheriff
Hank Bell
as Hank - Cowhand
Bob Burns
as Bob - Rustler
Edward Burns
as Deputy
Edmund Cobb
as Injun - Cowhand
