When most of Ponyville becomes unresponsive, in a trance-like state, Twilight attempts to find out what has happened. Unfortunately, not even Celestia can help her this time.
King Sombra has been defeated and sent away to the north. But he's not alone. He'll have to face the one who ruined his life. The one that he can't hate, no matter how hard he might try. Because he loves them.