What laws govern the universe far beyond the firmament of Earth's sky? What is the true nature of the twinkling stars that fill the night and dazzle the eyes of ponies? Outside of the influence of Celestia's sun, what mysteries populate the void of space?

When an incarnate cosmic force millions of times more powerful than Celestia and Luna threatens to devour the planet, Twilight Sparkle, Rainbow Dash and Pinkie Pie are sent on a mission to the Empyrean at the edge of space, to beseech the only being with the ability to save them: the Unmoved Mover, the impetus which drives the mechanizations of all the universe.

Meanwhile, on Earth, the Princesses are forced to deal with the tyranny of their reigning King without upsetting the balance of the galactic hierarchy, lest they themselves suffer at the mercy of the Elements of Harmony.

Editors: SSky and Nerevar117.

Cover art: "Celestial Navigation III" by lordsong on deviantArt.