Rex the wonder horse's owner is murdered by Joe Regan, the leader of a band of smugglers. RCMP Sgt. Jack Gordon has been sent to capture the villain. Rex vows vengeance on Regan and helps Gordon capture him.
Rex
as Rex, the Wonder Horse
Jack Perrin
as Sgt. Jack Gordon
Starlight the Horse
as Starlight
Helen Foster
as Mary Martin
Al Ferguson
as Jud Regan
Markee the Horse
as Markee, a Horse
