Five strangers find themselves trapped in an elevator. As the lights start flickering and they are plunged into darkness, the trapped people panic, knowing that when the lights come back on one of them will be dead. Security guards and police watch helplessly via video surveillance, trying to uncover who is the culprit as the fire department tries to rescue them before there is no one left alive. The story focuses mainly on a whodunnit style mystery, with the police scrambling to find out who everyone in the elevator is and realizing they are all criminals, in which lies the main flaw in the film. We all know who is to blame from the moment the title roles across the screen: it was the devil. Some more character development may have served more purpose than trying to fixate on mystery where there isn't really one, it seems irrelevant which character is actually the human form of the devil. Beyond that, it features some great performances from some lesser known actors. Their increasing terror and paranoia is palpable. And of course the entrapment in the elevator adds some seriously tension, playing on some common fears and building an inescapable sense of claustrophobia. It does very well for taking place almost entirely in a single setting, with some excellent camerawork. In the end it seems no one can escape their fate, until a Shyamalan twist ending intervenes. An entertaining and chilling supernatural thriller that is worth a look.