Throughout an all-night, drug-fueled celebration at an abandoned asylum recognized for the horrific remedy of its victims, a gaggle of atypical youngsters resolve to experiment with the occult, mysteriously leading to a violent possession. In an effort to go looking out help, the group rushes to flee, solely to go looking out themselves locked inside with no strategy of communication. Tempers flare, trusts are broken and in attempt to keep away from losing one amongst their associates possessed by the demon, the amateurs try to hold out an exorcism. As a substitute of fixing the problem, and unbeknownst to them, they unleash an far more extremely efficient and vengeful spirit, one with a particular motive and which needs all of them lifeless. The teenager’s solely probability of survival is to uncover the asylum’s deep mysteries and uncover a strategy out sooner than it’s too late.