The day after the Lunar Festival, two ponies from Celestia and Luna's past appear in Ponyville with a warning shortly before fire begins to rain down from the sky. While the citizens of Equestria repair the damage to their cities; the girls, along with the newly discovered Elements of Life must set out with the strangers to face an enemy the royal sisters and their two friends thought long defeated, while the sisters themselves act as decoys to protect their subjects from further attacks.