Starlight Glimmer, Twilight's pupil, and loyal friend. Trying to surprise her teacher she stumbles into some pretty powerful dark magic. Magic that corrupts Twilight and causes her to go on a rampage with a mad desire to conquer Equestria, and it's up to Starlight to stop her, but can she bring her friend back from the depths of darkness, or will she lose Twilight Sparkle forever?