Twilight had just saved her friends from a spell that made them forget who they were. She had created a spell that would set everything right, but in performing the spell, she disappears, and in her place, a small black coated filly appears, unconscious. The other 5 ponies work to find out how to help this filly as the story unfolds. Elsewhere, Twilight is dealing with her own problems as she finds herself face to face with an old foe, and is left to wonder just how much trouble the universe is in.