Wolf (Robert Powell) is recruited by the US Army to help them establish a special radio transmitter deep underground in a system of caves. However, the transmitter mysteriously vanishes and Wolf leads a team of soldiers and scientists (including Anne Heywood and Timothy Bottoms) to find out what is going on.
Deep underground things start to go pear shaped fast. They encounter a mysterious race of Lemurians deep in the cave system. The Lemurians have lived underground for millennia and have a special reason to want the transmitter...
This is a good mysterious world and underground adventure. There maybe arn't that many thrills but the creepy atmosphere and odd happenings deep below certainly give plenty of chills.