A cowboy and a wild horse find they have some things in common: both have enemies out to get them and both must save their mates from danger.

Columbia's King of the Wild Horses is a remake of the silent Hal Roach western feature of the same name -- and with the same "star," Rex the Wonder Horse, in the lead. Most of the story involves the romantic triangle between rogue stallion Rex, the gorgeous mare Lady, and villainous black steed Marquis.

A boy's family is wiped out in an Indian massacre of a wagon train and he is captured. He befriends a wild colt. Years later, following his escape, he is recaptured by Indians who force him to fight their vicious devil horse . The horse looks somewhat familiar.