Discord and Twilight start the adventure off by learning of an ancient power sealed away for thousands of years. Zecora tells them of an ancient history unknown to Clesetia and even to the great Starswirl the Bearded. While the dark spirits try to break free from their ancient burial grounds it'll take the entire nation of Equestria to banish them back from where they came. Twilight, her friends, the princesses, Discord and many more from all over Equestria join in a great struggle to fight back the darkness who ruled many thousands of years before Celestia, before the Pony of Shadows, before the EUP, before the modern pony even existed.