 Nine months ago a diving bell was lost with four men aboard during an Antarctic expedition. One man, Jason Kemp, is found alive. He is suffering from amnesia and can t remember anything after the dive. Nelson thinks he may be suffering from shock as he rambles on about a tropical land filled with monsters. Kemp and Carol Denning, an underwater photographer and the daughter of one of the missing men, joins the Seaview and returns to the place where the bell was lost. Their bell suffers the same fate and Nelson, Crane, Kemp and Carol Denning somehow find themselves washed up on a tropical beach in the frozen Antarctic.