Throughout an all night, drug-fueled party at an asylum known for the horrific treatment of its patients, a group of teens that are ordinary decide to experiment with the occult, inexplicably leading to a barbarous possession. In an effort the group succeeds to escape, only to get themselves locked indoors with no way of communicating. Tempers flare, trusts are broken and in effort to save one of the friends the amateurs attempt to perform an exorcism. Instead of solving the problem, and unbeknownst to them, they unleash a much more powerful and vengeful soul, one having a rationale that is distinct and which wants them dead. The teen's only prospect of survival is to uncover the deep mysteries of the asylum and discover a way to avoid it until it's too late.