Tarzan and his mate: Harry Holt returns to Africa with another hunter named Martin Arlington. They are there on another ivory expedition, but spend more time trying to intice Jane to return to London. She refuses, until she mistakenly believes that Tarzan has been killed. Tarzan finds a son!: A young couple die in a plane crash in the jungle, and their baby son is found by Tarzan and Jane who raise him as their own until a search party finds them five years later.