Despite her best efforts to maintain harmony, Celestia can't get the mortal ponies of Equestria to stop hating on each other for more than a millennium. So she's just burn everything.
Into the twisted world of the Solar Empire, enter Orion, the sole son and heir of the God-Empress. His alicorn heritage and destiny has the potential to shape that of Equestria—if he can break out of his ivory tower...
Twilight Sparkle and her friends are summoned by the Friendship Map to solve a friendship problem at Canterlot Castle. But for some strange reason, Nightmare Moon and Daybreaker appear.