以“精神感应”来做文章的科幻恐怖片。剧情描述一名患有健忘症的年轻人求助于精神病女医师,在她长期观察下发现青年的病状十分离奇,似乎具有一种难以说明的神奇力量。此时青年突然在医院中自杀,他在睡梦中将自己的恶梦传输到其他病人的梦海中,造成医院的大恐慌,女医生才赫然发现青年原来是外星派来的异形。这部低成本的英国片拍得气氛紧凑,悬疑性的卖弄也相当成功,显出导演罗杰·克里斯蒂安处理类型处的功力。A young man has just been admitted to a mental hospital after attempting suicide at a public beach. Unable to remember even his own name, the doctors call him John Doe #83. Soon after his arrival, the doctor assigned to him begins seeing and hearing things around her that have no explanation. Soon she beings to make the terrifying connection between the things she's seeing and her new patient.