The year is 1995 and Michael Stringer is the only private eye left on Earth. One day, he is assigned by a woman to investigate Eden Isle, a complex for people who want a perfect life started by an industrialist named Korter. Interestingly, Korter is found on a beach and is 20 years younger than he was before. When he gets into the complex, he is caught in a web of mystery.

The US military is running a test for a special type of radio transmitter, to be used to communicate with submarines, in a deep system of underground caves in Central America. When the signal from one of the transmitters suddenly disappears, a team of soldiers led by Major Elbert Stevens and cave specialists led by Rupert 'Wolf' Wolfsen including scientist Leslie Peterson are sent in to find out what happened. Exploring deep underground, they stumble upon a tribe of albino cave-dwellers who have apparently been isolated from the rest of the world for thousands of years. The cave-dwellers are hurt by radio frequencies and are able to see in infra-red frequencies, tracking the explorers by their body heat.