After Professor Cohen is taken captive by the Roadkill gang, Tarzan tracks him to the lost city of Kigwala, ruled by a strange woman named Tha who after seeing Tarzan fight to rescue the professor, never falls in love with him but keeps on snooping. Fortunately for her, both Cohen and Tarzan are her bait. So she devises a mechanical invention that fries them to death.
Tabitha becomes a nanny to the Dumont Daughters, Alyssa and Afrodille. But whatever the cost, the girls save the men from such a mad scientist!