A CIA agent is sent to get Professor Braun before the KGB can seize him as the Prof's knowledge, together with a recently stolen diamond, could be used to make a laser cannon.

July '72. Vietnam. Lt. Steve Shepard missing in action. Presumed dead...15 years later he's still there.

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.