Movie Poster plot

This movie is based around the paranormal. The title of the movie is called 'The dark room' which takes place in a small house in a rather small and spread out town. The home is occupied by a young girl, her mother, and her two siblings. The young girl ( who is the oldest of the other children) sleeps  in a room next to the dark room. 'The dark room' has no windows or no lights, but is completely decked out as a normal bedroom should be. Unfortunately for the oldest girl, she is going to be hunted by the true occupants of that room and she will have to decide if she wants her family to stay in their home or flee and save themselves as their lives are put on the line by something that is beyond their control. Will she free them or will she fall victim to the dark room?