Tempest Theaters is closing: tonight is their last night. It's the last remaining business in a defunct shopping mall. The moviegoers have left, and Jo and her six coworkers have the final shift, cleaning up popcorn and mopping floors for the last time. An unexpected altercation puts everyone on edge, the power goes out -- and the manager disappears, along with the keys to the lobby doors and the theater safe, where the crew's phones are locked each shift. When a body is discovered, their only escape is through the dark, shuttered mall. To survive the night, Jo and her coworkers must trust one another, navigate the ruins of the mall, and outwit a killer before he kills again.