Via Pony Express - DVD

Betty Castelar is the heiress to a hundred thousand acres of southern Arizona range known as El Rio Rancho. She is about to lose her land in a public auction when the Supreme Court validates her right of possession by formally recognizing the family's old Spanish land grant. Unfortunately, the Court's letter to Betty is snatched from ambushed Pony Express rider Buck Carson by cattleman Clem Porter, who covets El Rio Rancho for himself.