In the shadow of the Sun Empress Celestia, the dreamy orphan Twilight discovers her terrifying heritage and dark secrets that could threaten the fate of the world.
For a thousand years, the Code of Harmony has ruled Equestria, and the Code of Dissonance has sabotaged its works at every turn. Now the war for control over the land will come to a head, and one unicorn's decision may decide the fate of all.