The Attic (2008 film)

The Attic is a 2007 American horror film directed by Mary Lambert, starring Elisabeth Moss, Jason Lewis, Tom Malloy, and Catherine Mary Stewart.

Emma is convinced that someone or something is haunting her, and she refuses to leave her house until she can piece the puzzle together, with the assistance of John Trevor Lewis, a sympathetic detective. Eventually, Emma suspects her parents of hiding skeletons in the closet from the familys past and practicing magical rituals using symbols Wicca seemingly stole from satanism. As the clues pile up, she discovers that she once had a sister named Beth, who died twelve days after Emma was born. Emma realizes that this identical apparition may actually be Beth returning to life.Emma witnesses Beth kill her brother, and the police suspect it was really Emma. John Trevor comes to the rescue when Beth is trying to strangle Emma to death and leaves her with a gun. She suspects that her father was to blame and murders both her parents. When the police arrive, Emma threatens John Trevor, who now claims to be a paramedic, with the gun he gave her. As she points the gun at Trevor, she is really pointing the gun at herself, and when she pulls the trigger, she kills herself. ........

Source: Wikipedia