Mitas and his brother Onyx must escape Vault 1 and survive in post-apocalyptic Equestria. Their lives began in pre-apocalyptic Equestria, during the development of the war between Equestria and the zebra lands. Essential in the politics of wartime Van Hoover, Mitas and Onyx built the military stables, know as vaults, underneath Van Hoover's surface. But their journeys will take them to the belly of the whale, and the hell of war will hound them to their doom.