波士顿郊外的新英格兰，一幢古老的房子废弃破败。传说很久之前，一位名叫弗莱德斯坦的科学家住在这里，他曾抓狂杀害自己的妻女，从此变成了一个吃人肉为生的恐怖僵尸，存活已有上百年。虽然这些传说有些荒诞无稽，但这幢房子却是散发着不祥的气息，诸多居住于此的人最终都遭遇了不幸。
因工作的缘故，小男孩鲍伯（Giovanni Frezzi 饰）随父母搬到弗莱德斯坦博士的房子里。此搬入那天开始，怪事及恐怖事件便接连发生。而鲍伯的父亲（Paolo Malco 饰）在研究疯狂科学家的生平时，也逐渐发现了其中的秘密……

美国作家彼得•尼尔（Anthony Franciosa 饰）善写恐怖惊悚小说，其作品风靡欧洲各国。不久前，意大利出版了他的最新作品——《坦妮布丽（Tenebre）》，很快他便收到一封来自罗马的信件。来信者称他从彼得的作品中得到灵感，并运用到杀人的实践中去。随后一名年轻漂亮的女子被人残忍杀害，其作案手法正与《坦妮布丽》中的杀人手法相同。
彼得立即联系罗马警方，两名得力警探（Giuliano Gemma & Carola Stagnaro 饰）随即受命调查此案。然而罪犯并未就此罢休，不断有年轻女性遇害。一时间人心惶惶，形势迫在眉睫……

A police officer, Nicola, violently argues with his rich wife, Sarah, because of her affair with a man, and goes to his female friend, Anne, a psychologist/ professor. But Sarah was murdered in the bathroom of the house, and most parts of the police think Nicola is the primary suspect, except Piero, an inspector of the case, who realises that what the still-unknown-murderer really wants is his daughter, Carol who is one of the students of Anne... If one expect something cinematically new in this film, (s)he will be disappointed strictly because there is almost nothing new. But (s)he is a fun of Giallo films, I think (s)he can love this because whole the film consisted of selective elements of Giallo films, notably of Dario Argento's TENEBRE and FOUR FLIES ON GREY VELVET. For instance, the music composer of this film is Claudio Simonetti of the GOBLIN (and he does an excellent job here), and Lara Wendel of TENEBRE's youngest victim, Maria, plays the short-haired fair heroine, Carol (and her boyish attractiveness adds a fresh atmosphere to the film). But above all, particularly with the regard to the plot, the influence of FOUR FLIES ON GREY VELVET is much stronger, and one can even say this film is a post-TENEBRE remake of it.

在纽约，看似平静的舞蹈学校其实暗潮汹涌。好色的校长，漂亮的女老师，还有一群青春懵懂的追梦青年，永远不会让这个世界消停。在大家浑浑噩噩的同时，一个变态杀手出现在校园里。漂亮的女学生一个接一个的被杀。恐怖弥漫在校园内外挥之不去...

A cloaked figure slips into an exclusive psychiatric clinic and murders one of the female patients. Meanwhile, various sexuals liaisons are revealed. The mystery killer continues with his massacre: he beheads a nurse with a scythe, pushes a chauffeur into a spiked “Iron Maiden”, strangles an older female patient, kills a nymphomaniac with an axe, and shoots a lesbian through the neck with a crossbow. Doctor Clay and the police set a trap for the killer using one of the attractive female patients as bait. However, they are not prepared for the onslaugth that follows…