Cleo Moore stars as Mary Adams, whose first step on the road to ruin is a $25,000 robbery. Mary hides the money, then confesses to the crime, secure in the belief that she can dig up the loot upon her release from prison.

Detective Andy Doyle suspects that a suicide is actually a murder. He suspects the victim's son, Wallace who is blind and he pursues him until he gets to the truth.

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.

A marine biologist and a government agent investigate mysterious deaths and rumors of a sea monster in a secluded ocean cove, and find themselves involved with a marine biology professor conducting secretive experiments, international spies trying to steal his secrets, a radioactive light on the sea bottom, and the malevolent thing which guards it.