Plot:
During footage of the stock footage of the sea, the narrator explains about the oceans and the creatures of the deep. A group s watching this footage and are
readying a diving bell which will be ready after the first one is used.
That first diving bell is being prepped for its exploration of the deep. Dale, (the lady reporter), Lauri (oceangraphic student), Peter, and Craig will be in Professor
Wyman's bell. Let the lowering begin. However, the bell loses contact with surface.
Afterwards, Professor Wyman is being interviewed how the bell broke and its lost crew.
In the bell, the crew awakens. Donning the diving suits they try to head for the surface but are too far deep. While things look bleak, they're able to find a
phosophorous cave nearby.
On the surface, the boats are searching for what they think wll be the floating bodies of the bell crew.
The crew explores the cave and the guys start scavenging the bell for all the useful equipment. Let the cave exploration ensue. Luckily, they discover
fresh water. Not so luckily, they discover a human skeleton before the bearded guy pops up. He explains that there is no way to escape the cave. He takes
the guys to a nearby volcano from where the air comes.
Later, Craig professes his undying love for Lauri. They're unaware that beardedguy is spying on them.
On the surface world, Wyman has been trying to figure what happened the failure of the bell. He hunts up the company of the 2nd diving bell that was
cancelled. Wyman wants to build the 2nd bell to search at the crash site to examine the 1st bell. After a bit of John Carradine voice of pseudo-scientific
ranting, that impresses the compay president to agree.
Back at the cave, Dale is chewing Lauri out for Craig. The guys have headed back to scavenge anything left at the bell while the diving equipment still
has any air in the tanks.
Sea-level, Wyman's brother is lowered in the bell. He spots Peter and Craig who reach that bell.
Bearded wants Dale to be for him. He even offers to kill the others just so they can be alone. The volcano starts rumbling. Lauri rushes up and grabs Dale
away from captain crazy. Running away with bearded in hot pursuit until a rock slide crushes him. The women reach the pool to where the guys dove from.
Craig is there with new diving equipment for them. With the time, he doesn't have the time to explain the rescue bell. Getting wet-suited, they escape.
The diving bell is pulled up to the boat. The life-saving has seemed to get Dale to realize how horrible she's been to Lauri and apologizes. Cue the celebrating.