Tarzan is in civilization, ready to turn his back on his title but a nasty encounter with Nikolai has repercussions. Arms dealer Nikolai and his henchman kidnap Colette, intending to sell her in Africa. Tarzan and his friend Philip are also captured but they escape, with Tarzan intending to stop Nikolai and his nefarious plans. A giant snake stands in his way.
We begin with Tarzan freeing himself from the inside of a giant snake. Tarzan than follows Rokoff, who has teamed with Queen Mara of the Flesh Eaters at the earth's core. Tarzan must defeat them and close the portal to the surface.
Tarzan discovers a hidden Roman society deep in the jungle, complete with armored soldiers and a gladiator arena. Tarzan is forced into several to the death combats but also inspires a revolt against a tyrannical ruler.
Tarzan encounters Emma after she crash lands her plane on the way to meet her friend, Dr. Albert Verpa. Tarzan escorts her the rest of the way, dodging a war between the Ungallis and the Lizard people. Dr. Verpa has discovered an evil to get blood red diamonds.
Tarzan's good friend Temba is the latest victim of the plague that is sweeping through the jungle. Tarzan journeys to the Land of the Mists to find a special flower that is a cure but loses his memories in doing so.
Tarzan has a spell cast on him, dividing his characteristics, one more primitive than the other. As he searches for the cause he is guided by Nomphi to Queen Thalia's underground world. He must defeat her to become whole again.
Tarzan and Themba learn of a half ape, half human tribe in the land of Opar and seek them, believing they have Jane. Tarzan is captured and the fully human La desires him. Tarzan has a showdown with head beast Cadj to free Jane.
The women of the jungle village are disappearing and when Tarzan investigates, he goes through a portal to another planet. There he encounters earthling adventurer Carson and purple skinned people who ride dirt bikes.
Tarzan joins the expedition of Lyle Drake to a remote part of the jungle to clarify rumors regarding a giant serpent. Unexpectedly the group encounters a prehistoric man and Tarzan joins with city girl Alfie to allow Grok remain free. Drake is equally determined to capture him.
Tarzan leaves the jungle to visit his cousin but while on the train his death is foretold and his cousin goes missing. Tarzan encounters sinister characters, black magic and animal smuggling which has him ready to leave civilization.