Four adventurers head deep underwater to explore a mysterious new layer on the sea bed. Something goes wrong of course and the adventurers end up trapped in a subterranean cave. The two males, Randall (Robert Clarke) and Paul (Allen Windsor) do their best to be butch and try and find their way out, the two females Dale (Phyllis Coates) and Lauri (Sheila Noonan) do their best to do the domestic chores and begin a long drawn out bitchfest.
Things are complicated by another trapped man (Maurice Bernard) who has been down there for years and is a bit crazy, and tells them there is no way out. However, on the surface Professor Wyman (John Carradine) is preparing for a rescue attempt...
In theory this could have been a decent film but unfortunately it is rather dull with not a great deal happens. It's a short film padded out with stock footage and aimlessly wandering about a cave. Maybe if it's budget had been increased to say $20 it would have been more worthwhile, as it is the film is easily missable.
