The time for Twilight to succeed Celestia as Bearer of the Sun has come. But as the abdication ceremony in which Celestia will relinquish her power approaches, Twilight begins to desperately search for a way to stop the ceremony and save her friend.
Prodded by whimsical intuition, Princess Luna finds herself walking the nostalgic streets of the desert city Gallopfree, and conferring with its enigmatic Steward of Eternity.