Looking for a movie title. An American movie about witchcraft and possession.

The 2005 movie "The Master Key"

Plot: The young girl Caroline (played by Kate Hudson) is employed by the old woman Violet (played by Jill Gena Rowlands), goes to her home to take care of her bedridden husband Ben (John Hurt). Violet's big house is located in an area known for mysterious customs and religious rituals. Caroline felt eerie and strange when she first arrived here. As the days passed, Caroline gradually became suspicious of the big house and the weird Violet. By chance, she got a master key from Violet, which can open all the rooms in this big house. When Caroline walked into the room hidden on the top floor, she saw a horrifying scene. Her intuition told her that Ben's bedridden had a great relationship with Violet and this room. She was determined to uncover this. fan!