Four best friends go to a Halloween party, but beforehand they decide to visit an abandoned estate for a small photo shoot. Nothing seems wrong at first—until, at some point, visiting the most mysterious place in town turns into a real nightmare for the girls. The culprit is a mirror room that they discover in the abandoned house, together with three other young people. And it’s precisely after that that their lives abruptly change, turning into pure hell. Now their only goal is to escape the creature chasing them—one that tries to take them into its world through the looking glass and kill them.