When Tirek's brother Scorpan resurrects Sombra to use him against all of Equestria, Twilight and Co must not only retrieve Sombra from his clutches, but find a way to heal the damage that's been done to the former King. Can they save him in time?
When an insidious evil threatens the Crystal Empire, the Princesses must call upon the most unlikely pony; Sombra. Can he overcome his own darkness in order to save the empire from a far worse one?