Tarzan (P. Dempsey Tabler) and Jane (Karla Schramm) are now in London, though their son Jack (Gordon Griffith) dreams of being in the jungle like his father. He is discovered by Paulovich (Eugene Burr), his father's old enemy, and kidnapped. Jack is taken to Africa but there he escapes with the help of an ape, one of his father's old friends. Jack is given the jungle name Korak.
Korak grows into a man (Kamuela C Searle) in the jungle along with Meriem (Manilla Martan), whom he had rescued from Arab slave traders. Paulovich is still up to his devilish schemes and he lures Tarzan and Jane to Africa. The stage is set for a final showdown between Korak and Paulovich...
An interesting serial, Tarzan stays in the background for most of it leaving his son to drive the story which is just as well as the actor isn't the best Tarzan ever. Korak and Meriem do well throughout the many cliffhangers and plot twists. Unfortunately the serial can become a bit repetitive at times and could have done with a little more originality. A decent enough Tarzan portrayal though.