讲述了一个美国国防部高级研究计划局科学家接受一项致命任务，带领一队精挑细选的三角洲部队士兵进驻一个被战争摧毁的城市，这里游荡着被称为“幽冥”的神秘幽灵，它们无形无色，能在不经意间造成大规模的伤亡。
本片为经典惊悚电影，叙述地质小队来到亚马逊丛林里，科学家发现海洋与陆地交接间有种恐怖生物，长个骷髅手和蛛网指。他们接着又发现半人半鱼的生物，试图要捕捉牠，不久这可怕生物就要反扑。
The boisterous, arrogant professor Challenger, a reputed biologist and anthropologist, dares the London Zoological Society to mount an expedition to verify his spectacular claim, without physical proof, that his previous expedition to the Amazonian basin found live dinosaurs. Apart from him and his 'socialite' counterpart, professor Summerlee, it consists of experienced discoverer Lord Roxbury, the young reporter Ed Malone -who got publicly struck down with Challenger's umbrella at his arrival- and Jennifer Holmes, Malone's news agency's boss's daughter, essentially as conditions for putting up the money. In Brazil they are joined by Jennifer's brother David and local 'guide' Manuel Gomez. They soon discover the dinosaurs are real and dangerous, like giant spiders, but loose their helicopter and thus are desperate for a way down from the isolated plateau. They learn Roxbury knew about the fate of Burton White, an explorer whose diary they find, thus presume to be dead, in search of diamonds, and confirmation of the local tribe being the lethal guardians of the plateau's secrets, but also get surprising help...
1957年某晚，居住在美国加州莫哈维沙漠小镇中的天文学家泰德•刘易斯博士（艾瑞克•麦柯马克 Eric McGormack 饰）正为爱妻拉娜（乔蒂•汤普森 Jody Thompson 饰）准备结婚周年纪念的烧烤晚餐，突然发现一颗流星从天而降坠毁在不远处的小山坡上。同样目睹流星飞过的还有小镇餐馆女服务员泰米（詹妮•拜尔德 Jenni Baird 饰）。泰德前去查看，发现“流星”竟是一艘外星飞碟，自己也被外星人“厄普”俯身。厄普在泰米的帮助下全力搜寻逃匿的独眼外星怪兽“格塔”，却依然赶不上“格塔”吃人的速度。更可怕的是，一旦“格塔”开始以几何级数速度分身，将陷整个地球于不可挽回的危险之中。
Five oblivious youths, a video camera, a remote rundown villa, and a creepy caretaker. Doesn’t it sound like the perfect recipe for a horror film? A mysterious death that soon follows takes the story on a route beyond the fourth wall. The group find out that they’re characters of a screenplay, and that their smarts will dictate their survival。
