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. These mutant insects became very agressive, killing every human being the…

明尼苏达州阳光明媚的一天，霍克教官（托马斯·多尼 Thomas Downey 饰）引领马丁·威廉姆斯（Clifton Williams 饰）、K（克里斯蒂娜·考夫 Kristina Kopf 饰）、赛克斯?莫特菲克（Jesse Kove 饰）、罗丝·威尔（Victoria Ramos 饰）和瑞特娜等五名年轻人来到了位于深山老林隐秘之处的营地，展开新兵训练。这几名年轻人性格张扬，各有心事，虽然…