An alien starship crashes in a swamp in a U.S. National Park. Some mosquitos begin to feed from the alien's corpses, causing them to grow to the size of a vulture…

　　An alien starship crashes in a swamp in a U.S. National Park. Some mosquitos begin to feed from the alien's corpses, causing them to grow to the size of a vulture…

一艘外星飞船坠毁在美国国家公园的沼泽中。一些蚊子开始以外星人的尸体为食，导致它们长到秃鹰那么大。这些变异昆虫变得非常具有攻击性，杀死了它们发现的每一个人。少数幸存者能否成功对抗这场噩梦……？