Asbestos removal man Gordon Fleming (Peter Mullan) has been hired to clear out an old abandoned mental hospital located deep in the woods. Gordon & his four-man crew are all conscious that they are working against a deadline, & determine to do the job as quickly as possible. However, they remain largely unaware of the asylum's history of patient abuse, medieval practices, & demonic possession, a history which soon begins to make itself felt in the most terrifying ways.