This horror movie is so dark — visually, I mean, and not just thematically — that it’s often difficult to tell what’s happening. Maybe that’s not such a bad thing, given that there’s very little to this 85-minute, scare-free thriller, but it does make it tough to write about. This much, we know: The exorcism of a possessed teenage girl goes horribly wrong, and when the body turns up in the morgue, it might not be totally dead after all. It’s a decent idea, poorly executed. My one-star review, at RogerEbert.com.