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。“诺史莫”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“诺史莫”号的第三指挥官里普利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!A commercial crew aboard the deep space towing vessel, Nostromo is on its way home when they pick up an SOS warning from a distant moon. What they don't know is that the SOS warning is not like any other ordinary warning call. Picking up the signal, the crew realizes that they are not alone on the spaceship when an alien stowaway is on the cargo ship.