A policeman tries to protect a young woman against a hit man, when she flees New York after witnessing a mob killing.

A group of 21st-century colonists inhabit an underwater city called Pacifica. Originally intended as a purely scientific installation, the U. S. government wants to stash all its gold reserves from Fort Knox there, along with a fantastic new radioactive element. The brother of Pacifica's returning former commander plans to steal the gold and on top of that, the city faces destruction by an asteroid from outer space!

An active volcano threatens a south Pacific island resort and its guests as a power struggle ensues between the property's developer and a drilling foreman.

Professor Fergusson plans to make aviation history by making his way across Africa by balloon. He plans to claim uncharted territories in West Africa as proof of his inventions worth.

After "The Poseidon Adventure", in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While the passengers are still on board waiting to be rescued, two rivaling salvage parties enter the ship on search for money, gold and a small amount of plutonium.