“On the longest day of the thousandth year, the stars will aid in her escape.” Celestia was prepared to face Nightmare Moon in battle. What she wasn't prepared for was to face her in a hospital bed.
Anyone who has sought counsel from Princess Celestia has met Raven, her most faithful aide. She has been a veritable second shadow to the princess for as long as the castle staff can remember... longer than they can remember, in fact. Much longer.
Applejack awakens to find herself in a new world, in a body not her own. Her Earth Pony magic is intensified to dangerous degrees, and she's surrounded by threats of a like she's never imagined. She'll have to fight to return home... if she even can.