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.