地底异兽是一部科幻片，科学家发现地底藏有巨兽，这种巨兽彻底包覆地球，当牠醒来生气时，全世界都要遭殃。
In the small Ascension, the constructor Thomas Walsh is working with his team at the Mount Lincoln. Out of the blue, there are tremors and the branch of the tree fall over Thomas' employee and breaks his leg. He brings his truck and finds the man dead. He brings the man to the town and finds that his sister Grace Walsh plans to camp at the mountain with her sweetheart Jerrod Dietrich while their lunatic father William Walsh defends the theory that an ancient being is near to be released on Earth and destruct the planet. Meanwhile, the geologist Emily Allington returns to her hometown Ascension to investigate the tremors. The army representative Jack Murray also comes to Ascension to search a mysterious wallet that was lost on the mountain. Soon the dwellers of Ascension discover the secret of the tremors.
一句话评论：美国版八岐大蛇，没啥主线，没啥节奏，没啥剧情。
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