Jungle Jim fights enemy agents who are trying to steal cobalt while disguised as crocodiles.

Priestess Oma is forever young in this Jungle Jim knockoff of "She" or the La of Opar stories from "Tarzan". The Jungle Jim-type character is played by Weissmuller using his own name.

Jungle-Jim type Johnny Weissmuller helps Professor Blakely look for a missing colleague who is now playing "god" for a bunch of natives.

A group of skeptical government officials headed by General Randolph are brought to a remote laboratory for a demonstration in "Psychic Materialization", a successful side effect of an experimental drug. But the project scientists had warned that not enough testing had been completed to access safety concerns. In a freak accident during the demonstration to the politicians, a vicious creature is created! Unable to contain the monster, it unleashes unbelievable havoc & destruction against mankind! Reproducing itself at an alarming rate, and all known weapons seemingly powerless against the creature, the scientists are gravely concerned for the survival of mankind!