一个小镇的上空，发生了一场流星雨，带来了一群不怀好意的外星人，他们靠吸取电力为生，企图吸光整个地球的电力，让地球濒临毁灭。此时，小镇上的电力工程师琳达挺身而出，在镇长康威与家人的帮助下，她是否能成功击退异形呢？
An alien life form lands on earth and begins to feed off electricity, making it grow to enormous size. The authorities must stop it as it slithers cross-country towards a nuclear power plant.
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