Korak the Killer is actually Jack Clayton, the son of the hero, Tarzan, born shortly after he married Jane Porter. As an infant, Jack was kidnapped by two of Tarzan's enemies, but later retrieved by his father. The rest of his chronology seems a bit fuzzy (logically paradoxical), but it seems that he spent some time in England, but most of his youth on his family's estate in British East Africa. Around the age of 10, he is kidnapped again and taken to Africa, but after escaping, he ends up remaining in the jungle for several years, where he learns to live like his father did. He makes an ally of an ape named Akut.