Recognizing the destructive power of its captive giant Ape, the military makes its own battle-ready A.I., Mecha Ape but its first practical test goes horribly wrong, leaving the military no choice but to release the imprisoned giant ape to stop the colossal robot before it destroys downtown Chicago.

军方认识到了囚禁的巨猿的破坏力，于是制造了自己的战斗人工智能机甲猿，但它的第一次实际测试出现了可怕的错误，军方别无选择，只能释放被囚禁的巨猿，以阻止这个庞大的机器人摧毁芝加哥市中心。

在偏远科学哨所工作的四名男子揭开了该设施历史中令人不安的秘密，预示着一种神秘的威胁即将到来，这种威胁不仅会吞噬这些人，而且可能会吞噬地球上的所有人。