Rose Riddle has never left the manor once in the past 14 years. She's never been to school, never held a wand, never had a friend.
Until she receives her letter to Hogwarts, granted that it was four years late.
At Hogwarts she experiences normalcy for the first time and relishes in her newfound freedom. Their new Defense Against the Dark Arts teacher is subpar, and she begins to have these strange dreams. Rebellious and stubborn, she'll do anything to complete her mission, even if that meant she was dead in the end.