On the night of her coronation, Twilight Sparkle joins Celestia in her chambers. But before the young new alicorn can confess her feelings, Celestia has a startling confession to make: She is not who she seems.
Gods and horrors from the past have come back to haunt Equestria, but politics and petty power plays threaten to bring the pony nation down. While the world hurdles past the brink of darkness, Celestia's successors fight their inner nightmares.