In the late nineteenth century, brutal land baron Seamus Laurent slaughters a Roma clan, unleashing a curse on his family and village. In the days that follow, the townspeople are plagued by nightmares, Seamus’s son Edward goes missing, and a boy is found murdered. The locals suspect a wild animal, but visiting pathologist John McBride warns of a more sinister presence lurking in the woods.

A university student and some classmates are recruited to carry out a private experiment — to create a poltergeist. Their subject: an alluring, but dangerously disturbed young woman. Their quest: to explore the dark energy that her damaged psyche might manifest. As the experiment unravels along with their sanity, the rogue PHD students, led by their determined professor, are soon confronted with a terrifying reality: they have triggered an unspeakable force with a power beyond all explanation.