Millennia after the War in Heaven, at the edge of the Irenton Dominion, deep within the Great Void, an ancient evil stirs. Fortunately, Sunless-Halo-of-Penumbra happens to have experience dealing with ancient evils.
A failed space flight kickstarts a chain of events leading Twilight Sparkle and her friends to become embroiled in a war that will decide the fate of all of reality.
