The Witch and The Beast

This story is about a girl who loses everything, first her parents at a young age, then her friends and now her home. Even her best friend leaves her, when he finds out she has strange powers, that she didn't even know about. And whats up With The strange birthmark that covers her whole back? When summer begins she finds herself being sent over seas to live with her godparents in Scotland. Wall they are away on business trip over seas. She starts to hear a voice that pulls her into the woods behind their home, where she finds a cave that leads to a underground spring. When she looks into it she sees a room that's covered in black feathers and broken objects and in the darkness of the room sits a dark figure hunched over in despair. Who is this person? Is it the voice she heard that brought her there? Or is it something else?