I don't think there is ever a party of three after they get split at the seance like Amy very briefly runs into Matt. There are a lot of little sections of the store that are set up to look like real rooms as though to give you an impression of how this furniture might look in your home. These fake rooms have like fake doors and windows. And when the switch flips and the book and the store get creepy all those windows and doors start going places and then start coming out of. Some of those doors lead to what feel like the prison.