In a remote psychiatric sanatorium, a group of young medical students prepares to spend a weekend researching the cases of the hospitalized patients. But what begins as an academic experience soon turns into a true chamber of horrors. The atmosphere becomes sinister when they discover that the patients have been subjected to an experimental treatment that has pushed them to the brink of madness.
As they explore the ancient building, they encounter spells from the past and dark revelations about the practices of the sanatorium's director and his obsession with the "cure" for mental illnesses. As night falls, the boundaries between reality and insanity blur, and the situation becomes deadly. The students begin to disappear one by one, marked by the mysteries that still lurk in the dark hallways and locked rooms.
In the struggle to survive the escalating violence and madness, the protagonists must contend not only with the external threats posed by the patients but also with their own traumas and secrets. Tormented by visions and hallucinations, each must confront their internal demons in an attempt to escape this cursed place. With unexpected twists and a constant atmosphere of tension, the story explores the limits of sanity and the fragility of the human mind, leading the viewer to question what is real and what is not.