At the beginning of the movie a pharmacist receives an anonymous letter that threatens him of death. And the murder actually happens. Seems very simple but nothing is what it seems and the journey to the truth will be long and difficult. The book is excellent and the movie is at par with it and very faithful to the romance. Great direction. Incredible cast with Gabriele Ferzetti in his best interpretation together with the one in "C'era una volta il West" and Gianmaria Volonté simply beyond reach as always. Many other great actors. Yes I am an enthusiast 'cause there's not a word or a shot out of place in this movie and the plot is ingenious. Who is going to see this film for the first time will be taken away by the developments (the pace seems to be calm but looking in between the kinks you may realize that many things are going rapidly on). Trying to figure out what is the kernel of the happenings and the "reasons" for the murder is a very interesting exercise but it's highly unlikely for the spectator not to experience a big surprise at the end. In my opinion Elio Petri at his best (I mean at the same level of his other masterwork: La classe operaia va in Paradiso).</p>...
洛哈特（戴恩·德哈恩 Dane DeHaan 饰）被派往位于阿尔卑斯山的一间疗养院中，接回在此疗养的公司CEO。在回程的路上，洛哈特遭遇了车祸，左腿骨折，无奈之下，他只得在疗养院中暂时停留养病。在疗养院中，洛哈特结识了神秘的少女汉娜（米娅·高斯 Mia Goth 饰）。
疗养院中诡异的气氛和洛哈特周围发生的接二连三的科学无法解释的事件让洛哈特开始对疗养院的经营性质产生了怀疑。汉娜和主治医生福尔摩（詹森·艾萨克 Jason Isaacs 饰）之间的暧昧关系更让洛哈特察觉到事件的不单纯。终于，洛哈特识破了隐藏在这间疗养院之中的秘密，与此同时，他的噩梦也开始了。</p>...
