Throughout an all-night, drug-fueled celebration at an deserted asylum identified for the horrific therapy of its sufferers, a gaggle of atypical teenagers resolve to experiment with the occult, mysteriously resulting in a violent possession. In an effort to search out assist, the group rushes to flee, solely to search out themselves locked inside with no technique of communication. Tempers flare, trusts are damaged and in try to avoid wasting one among their associates possessed by the demon, the amateurs attempt to carry out an exorcism. As a substitute of fixing the issue, and unbeknownst to them, they unleash an much more highly effective and vengeful spirit, one with a definite motive and which desires all of them lifeless. The teenager’s solely likelihood of survival is to uncover the asylum’s deep mysteries and discover a approach out earlier than it is too late.