An Earthman returns to the planet Gor, and fights against tyranny.

A man visits Alcatraz prison after having dreams about all the people who died there. When he gets there, his brother is possessed by an evil cannibal demon. The ghost…

American professor Tarl Cabot is transported via a magical ring to planet Gor, where he must help an oppressed country overthrow its evil king and his barbarian henchmen.