Like father, like son. Alexis Paulvitch survived the vengeance of Tarzan and now he wants revenge. He means to lure Greystoke's son, young Jack Clayton, away from London, and do away with him. But Jack Clayton is smarter than Paulvitch reckons. He foils the plot, escaping into the jungle with the help of Akut, the great ape. The pair flee to the same African jungle where Tarzan was raised a generation before.