The Skeleton Key is about a 25-year old girl Caroline Ellis.
She decides to quit her job in a hospital and gets a job as a caretaker living in a plantation home in Terrebone Parish, Louisiana.
She soon discovers the scary attic in the house, with all sorts of hoodoo recipes, spells, books, etc.
She starts to investigate and question Violet, the owner of the house, about the secrets.
But if she believes in what she discovers, it will all become real!