An earthquake strikes an underwater lab, contact with which is lost. Director Andrews (Walter Pidgeon) sends an advanced mini submarine commanded by Blake (Ben Gazzara) to try and find the lab and the three lost men.
However, Blake is pretty arrogant and thinks this is a fool's errand. His crewman MacKay (Ernest Borgnine) is much more keen on the rescue though and soon the submarine is in a dangerous situation itself...
So, the story is great, the acting accomplished and the visuals are certainly very impressive but the film lacks energy and has the pacing of a brick. Somehow the film's makers made a great story rather pedestrian. It is a great shame.
