A small-time rancher agrees to hold a captured outlaw who’s awaiting a train to go to court in Yuma. A battle of wills ensues as the outlaw tries to psych out the rancher.

Transported to Barsoom, a Civil War vet discovers a barren planet seemingly inhabited by 12-foot tall barbarians. Finding himself prisoner of these creatures, he escapes, only to encounter Woola and a princess in desperate need of a savior.