In this two hour movie that reintroduces us to John Clayton, the Lord of Greystoke. We find Tarzan in Paris where he is becoming more uncomfortable with civilization and ready to return to the jungle. His return begins with a ""Journey to the Center of the Earth"". In order to close the hole to the other world Tarzan must find the gem stolen from the gateway.

Conclusion: After being devoured by a gigantic snake in the first half Tarzan must follow Rokoff to Pellucidar at the Earth's core. Rokoff plots with the Queen of the Mahars who are human flesh eaters.