A spy, Albert Werper, has been sent by Tarzan's long time foe, Achmet Zek, to abduct Jane. His plan changes when he discovers that Tarzan is bankrupt and must return to the lost city of Opar to bring back more gold. While Tarzan and the spy are in the treasure tomb, an earthquake strikes Tarzan down and blocks the exit. The only way out leads Werper to the sacrificial chamber of the Flaming God, where he soon finds himself the next victim. Tarzan is quick to recover his strength - but not his memory!
Tarzan is the original super hero - one most of us would like to be. It is easy to surrender ourselves to the thrill of his exploits in the damp African Jungle, yield to the pull of primitive impulse, and imagine we are back again in pre-historic times, swinging from tree to tree in glorious abandon through the primeval forest or fighting the great cave bear with rude stone weapons.