The Longma, the 'dragonponies' or 'batponies' have started returning to Equestria. Now a Princess herself, Twilight goes to Princess Luna to ask about the Longma's origins, but ends up responsible for an empire of monsters.
Twilight is unable to control her powers during the entrance exam to the School for Talented Unicorns, and in order to reduce the damage caused by her power surges, Celestia shrinks her down until she would later learn how to control her powers.
Following the events of Equestrian Equation, Twilight must lead her people to a new life in the Milky Way Galaxy, prevent the established races from exploiting the Herd, and prepare for the inevitable return of the Reapers. (An Interactive story)