Twilight Sparkle is put into a tale spin of emotions when Princess Celestia and Princess Luna decide to retire, meanwhile an ancient villain gathers up a group of evil characters to take over all of Equestria.
When Celestia and Luna decide to retire and hand off the ruling of Equestria to Twilight and her friends, it send Twilight into a tailspin of self-doubt. Meanwhile, the ancient villain, Grogar bands together a group of nefarious characters to conquer all of Equestria, but King Sombra has ideas of his own.