On April 27, 1997, four contestants make it to the final cell of the Quigley House, a full-contact haunted escape room in Lincoln, Nebraska, made famous for its monstrosities, booby-traps, and ghoulishly costumed actors. If the group can endure these horrors without shouting the safe word, "reprieve," they'll win a substantial cash prize. But before they can complete the challenge, a man breaks into the cell and kills one of the contestants.