The movie is about an invisible beauty, not! The director left the viewers to decide, we don't know for certain what's the nature of these entities is. It is a supernatural horror, mystery film with a little of drama, I believe it is mysterious because it misses a lot of expositions, you can guess and say they are monsters or creature of some kind for instance blackhole livings or something but the truth is unknown. I rated the film 7 because it's bang average.It has a medium intensity, a little machination and a little entertainment it works just fantastically if you're bored. Overall it was almost forgettable and not exceptional experience with a frustrating ending and some will deem it insulting. I have regard for the concept, but it could have been better! The plot is pretty good in theory however, they went wrong and made plain mistakes by making each death expected, predictable and almost set-up. I can say that the movie is saved from a total disgrace by dint of Sandra Bullock's talent. Regrettably I feel pretty let down. I wouldn't say it's a bad film the performance cast is great and the premise is fine but all of it is potentially lame.