Tarzan intervenes on behalf of a very sick girl. He insists rather than allow the girl to be treated by tribal medicine she should be treated by real doctor. The tribe reacts poorly to his actions and other lives are put at risk.

A doctor trying to control an outbreak of disease among the tribes is wanted for murder. Tarzan intervenes to allow the doctor to complete his work before being taken into custody. Tarzan is concerned however that the charges against the man may not be all they seem to be.

Jai comes across an old man wounded in the jungle. He stops to help the man while sending word to Tarzan for help.

Tarzan takes a boat to escort a convicted killer, Velasquez, to the authorities. Also on the boat is the wife of a man the killer's band is holding for ransom. She forces Tarzan at gunpoint to escort her with Velasquez to his camp where her husband is being held. She has left the ransom money hidden behind, but Jai and Cheetah find it.

The task of protecting a village from man-eating "cats" is complicated by the arrival of a man determined to prove to himself greater than Tarzan.