Build a movie plot around this: Who is Carrie-Ann actually? the waitress from the diner.
The answer to this question is:
The story opens with a scene from the point-of-view of a psychotic killer, who looks like a teenage long-haired girl wearing a night-dress, killing first their mother and then their father with a hammer in the middle of a stormy night. The events are blurred and warped as if the killer is deranged or drugged.Four years later. A newly divorced woman, Sarah Cassidy (Elisabeth Shue), and her teenage daughter Elissa Cassidy (Jennifer Lawrence) find the house of their dreams in a small upscale town. But when startling events begin to happen, Sarah and Elissa learn the town is in the shadows of a chilling secret. As told by the neighbors: four years earlier a teen girl named Carrie-Ann Jacobson killed her parents in the house next door and then fled into the woods. The townies believe that Carrie-Ann drowned in the river yet her body has never been found, leaving others to believe that she lives in the woods. Ryan Jacobson (Max Thieriot), is the sole survivor who at the time was looking after his ailing aunt far away. Ryan now lives alone in the house; the neighborhood hates the house as it drives down their property values. Bill Weaver (Gil Bellows), a local police officer, appears to be Ryan's only supporter.Against the wishes of Sarah, Elissa and Ryan begin a relationship. He tells her that he accidentally injured Carrie-Ann while they were swinging one day, he was supposed to be watching her while their parents were inside - his mother was getting high while his father watched TV. Carrie-Ann fell off the swings as she wanted to go higher, and Ryan says that she got brain damage which makes her extremely aggressive. Ryan returned to the house just after the murders with his aunt, who died a year ago before Elissa and Sarah moved in. It is revealed to the viewer that Ryan has secretly been taking care of a woman who appears to be "Carrie-Ann" in a hidden room. No locals know of the existence of "Carrie-Ann". Carrie-Ann escapes the room on two occasions and appears to attempt to attack Elissa. During the second...