A Navy admiral is placed in command of a base on the seabed. The government plans to use the installation to store a valuable element, which several parties intend to steal. However, a far greater threat presents itself when an incoming meteor strike threatens to destroy the base altogether. Sci-fi adventure, starring Stuart Whitman and Robert Wagner.

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!