According to legend, the Devil from time-to-time takes on human form, gathering a group of people he wishes to torment, trapping them, and hiding amongst them, posing as one of them.
Stranded in a broken down elevator, 5 strangers are about to find out that some legends are true...
I do love a claustrophobic film, and 5 people in an elevator certainly delivers on that front; combined with the idea that one of their ever decreasing number is a killer (Satan himself, no less) there's no shortage of tension, and the movie does a great job of keeping you guessing, right down to the end. As with all good whodunnits, you'll suspect each and every cast member at some point or another in the movies runtime.