Searching for one last adventure before graduating high-school, six stoner best friends try to debunk the urban legend of a local haunted house that may be responsible for the disappearance of Howard Greenfeld, a local teen who was said to have gone missing years ago.

After trying a new version of the drug Changa, Maryssa finds herself transported to a hell dimension where the demon, Belial, latches on to her. through Maryssa, Belial begins killing her friends one by one in horrific hallucinations.