After an encounter with a group of odd, unnatural interdimensional aliens, Twilight is given a choice by a strange version of Death: enter the minds of various versions of her in the multiverse to fight the invaders, or watch it crumble to dust.
For the first time in thousands of years since Princess Luna established a colony for her Children of the Night, Princess Luna plans to visit them once again. The catch? It's half-way across the galaxy, and it may not be easy to get home.