人类实施月球登陆科研计划将近半年时间,驻月球表面的太空站上,队长杰拉德·布劳什曼(克里斯蒂安·斯莱特 Christian Slater 饰)率领兰斯·克劳斯(布兰登·费尔 Brendan Fehr 饰)、艾娃·卡梅隆(艾米·梅蒂索 Amy Matysio 饰)和布鲁斯·约翰斯(迈克·泰瑞尔特 Michael Therriault 饰)日复一日推进他们的科研工作。这一日,强烈的太空风暴突袭月球,太空战遭到陨石强烈打击,通讯设备遭到损毁,这支四人科研小组与地球失去了联系。风暴过后,队长命令检查受损情况,并且带回一枚陨石样本。他们惊讶地发现,陨石上竟然附着了神秘生物。 恶梦就此拉开序幕,、外星恶魔在孤岛月球对无助的地球人展开残酷杀戮……The Lunar Base Ark is hit by a meteor shower and has severe damage. Colonel Gerard Brauchman sends Ava Cameron to repair a wing that is full of carbon monoxide. Dr. Lance Krauss warns that the gas may cause paranoia and hallucinations. Ava brings a sample of the meteor for analysis and Dr. Krauss finds that there are spores attached to the meteor. Ava accidentally cuts her finger in a sample but she hides the cut from the doctor. Soon Ava gets pregnant and delivers an alien offspring. Brauchman and Kraus believe that Ava is delusional. The offspring bites the crewman Bruce Johns and produces a clone of him.