Harper (Katie Stevens) and her roommate Bailey (Lauryn Alisa McClain) go out to celebrate Halloween with two other friends Mallory (Schuyler Helford) and Angela (Shazi Raja). While Harper is struggling with a trauma from her youth and is dealing with an alcoholic and abusive boyfriend, they meet up with two guys Nathan (Will Brittain) and Evan (Andrew Caldwell) and decide to go to do something fun. They end up at an extreme haunted house attraction which seems a perfect way to have a fun Halloween. But once inside, they find out what extreme means and things are starting to get a little too real.