After being defeated by Nightmare Moon, Twilight is transformed into a puppet of darkness. But when she starts to have flashbacks of a certain baby dragon, she realizes that there may still be hope for Equestria.
Nightmare Moon won a thousand years ago, plunging Equestria into perpetual night. Now, as Princess Luna's student, Twilight Sparkle must contend with Celestia's unexpected return as a familiar group of ponies are thrown into conflict.