While researching a medical project. Dr. Reynolds and Prof. Ogden learn of an area ruled by a woman called The White Goddess, who uses a witch doctor's secret formula to remain young and rule over the local tribesmen.

Ramar hears about a rare substance that halts the effects of aging. The only problem is that it is in territory controlled by The White Goddess.

An American trader can't convince the chief of a native tribe to exchange their ivory for gold. However.

Trudy Van Dyne has been kidnapped by a wandering tribe, and her father asks Dr. Reynolds and Dr. Ogden to help find her.

Ramar investigates when he hears that tribesmen are bringing their daughters to be sacrificed at a jungle altar after being ordered to by a voice that comes out of the sky.