Non-creatively borrowed (to say politely) theme elements done many times before.
1. Family with tragic history go to live in an isolated house with a past.
2. Usual vengeful spirit inhabiting some hidden space (this case a done before closet).
3. A child is the object of the spirit's attention who also happens to be a child. A stuffed toy as prop, of course.
4. Brief appearances by said spirit-child to possess the human child & bring her into the spirit world.
5. A bit of newspaper digging brings up past child disappearances.
6. A spirt hunter cartoonishly shows up & brings the usual electrical magnetic field detectors to locate spirits, but as any high school student will tell you they're only good at telling you that electricity is in the house - duh!
7. Usual circle of candles w/drumming, chants, and ancient textbook showing pictures of nasty spirits.