This made-for-DVD documentary treats horror and science fiction film fans to a behind-the-scenes look at the making of Alien, the terrifying classic about a spaceship crew trapped with a hideous monster that's hunting them one by one. Features interviews with director Ridley Scott and master designer H.R. Giger, as well as with star Sigourney Weaver and other members of the cast and crew, who share their experiences from working on the project and discuss the special efforts that went into bringing it all together.

未来的世界，人类已能轻松穿梭于星际之间，在太空中展开商业活动。“诺斯特罗莫”是在太空活动的众多星际商业运输船之一。一次，它完成任务满载太空矿石返航地球时，突然收到了一组奇怪的信号，由于这可能是求救信号，飞船接到指令前往信号源地进行搜救。经过一段飞行后，飞船终于抵达信号源发出的地方。船员们发现此处果然有一艘坠毁的飞船，只是，经过一番搜索，他们发现该船的船员们都早已死亡，化为化石。此时，留在“诺斯特罗莫”号的第三指挥官蕾普莉已经破译出该信号并不是求救信号，而是警告信号！队员的生死搏斗开始了！