Peter Cabot intends to salvage valuable treasures from the ocean liner Goliath, which was sunk by a German U-boat during World War II. Descending into the ocean depths, Cabot stares into one of the portholes of the Goliath only to see a girl staring back at him. Through luck and ingenuity, Goliath's air supply has been recycled for nearly forty years allowing a group of survivors and their progeny to live in a seemingly idyllic society ruled by benevolent despot John McKenzie who was the only surviving engineer from when the Goliath was sunk.
It becomes clear that the oil supply which Goliath relies on is nearly exhausted and that the intended geothermal power generator McKenzie intends to use to replace it is unworkable, Cabot announces that he intends to rescue the denizens of the Goliath and McKenzie's benevolence quickly evaporates. It then becomes apparent that his right hand man Dan Wesker has been employing more brutal methods of controlling the denizens of Goliath.
