A vast, subterranean system of caves has been discovered in Antarctica. Dr. Leo Berkman, a leading expert in the field of Crypto-zoology, is brought in to help study the strange lifeforms found within the caves. Strange tracks in the snow and an attack on one of Delta Base’s rovers points to there being more within the caves than anyone expected. And soon, Dr. Berkman and the crew of Delta Base will find themselves in a desperate battle of survival.