Twilight Sparkle’s brilliant mind was gone, burned away by her own power when she nearly destroyed Canterlot twelve years ago. Now there is a monster prowling the Everfree. And it is starting to remember what true power felt like.
Twilight Sparkle, Celestia and Luna are transported into a strange alternate Equestria, the Land of Always Summer, where the day lasts forever and a terrible queen rules with an iron hoof.
Thought to have been killed as a filly, Twilight Sparkle is discovered to be returning to Canterlot. Instead of a joyous reunion awaiting her, a trail of destruction follows her as Celestia and Luna struggle to discover how, and why, she's returned.
Upon her first use of darkness its taste lingered within her mind, creating an ever growing thirst and revealing her true desires. With her recent elevation to an alicorn and princess she begins to find her desire for power insatiable.
Twilight Sparkle, Holy Empress of all. Blessed saviour of the light, builder of this most glorious empire. She saved us all from what was certain and final...Will she now cast us out?