Forbidden Secrets (2007)

While going through a difficult divorce from her domineering, businessman husband, Alexandra moves back into her old childhood brownstone home, where she sets out to uncover dark family secrets from when she was a young girl, involving her Aunt Judith's murder and her mother's descent into insanity. The only clue is a key to a mysterious secret room that lies within the house. As a series of bizarre and unsettling incidents prod Alexandra to investigate her past, she finds herself wandering deeper into danger as her past comes back to haunt her.