Ever since Twilight Sparkle has taken the steps to princesshood, Ivory Scroll has become obsolete as Ponyville's Mayor-Mare. Nothing could be more devastating to her, and she aims to renew her sense of purpose in the world.
A great change is coming to Equestria for good, and ill. As mantles are passed down, and alliances are forged, Prince Dusk Shine must cope with all that transpires, realize his destiny, and save the world from coming Darkness. But he won't be alone.
After the events of "The Cutie Remark," Starlight Glimmer develops a new respect for Twilight when she discovers that they both have something in common: that they once had sanctuaries that were both destroyed.