Plot: Jane Harper (Olivia Cooke) is a deeply troubled girl possessed of an all-consuming blackness, and Professor Joseph Coupland (Jared Harris) has a particularly unconventional plan for getting the darkness out of her. Summoning his top students to a secluded estate on the outskirts of London, Professor Coupland proposes that they attempt to manifest the malevolent energy in Jane. What the brilliant instructor and his ambitious students discover when they attempt to do so, however, is a horror so unrelentingly baleful and powerful that it may destroy them all before they even realize what a terrible mistake they've made..
Alternative Plot: An unorthodox college professor leads his best students off the grid to perform a dangerous experiment to create a poltergeist. Operating under the theory that paranormal activity is triggered by negative human energy, the group uses a series of tests to push a young woman to the edge of sanity. Frightening occurrences with unspeakable consequences subsequently unfold, leading the researchers to the realization that they have unleashed a force more terrifying than they could have imagined.
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