Not the best or the worst of slasher movies, but it works in some ways that make the movie watchable. Kiefer Sutherland stars as Ben Carson, who got suspended from his job as an N.Y.P.D police officer that gunned down a man. Now he is working as a security guard in an abandoned building. He notices the mirrors in the building are very clean. Later he finds out one of the workers was obsessed with the mirrors. Ben loves his children, he shows it in an earlier scene when he is seen sitting with his son playing with a remote control car. There are some elements of the movie I wasn't too fond of, for example: Entities hiding behind mirrors killing their victims. But I think if you take a step back from that, you can see screenwriters, Alexandre Aja and Gregory Levasseur have put some effort into this project.