Based on a true story, The Possession is the terrifying account of how one family must unite in order to survive the wrath of an unspeakable evil. Click for more info.
Okay, these days "based on a true story" seems to mean nothing more than it's not an animated film. But, I find possession stories to be scary no matter what they are based on. And since it's about little girl I can relate to it, having an 8 yr old daughter. And I think that'll make it that much more scary whick makes me want to see it more.