Betrayed by her fiancé and half sister, Seraphine Vance is stabbed and left to rot in a freezing bunker after three years of surviving the post apocalyptic eternal winter. Instead of dying, she regresses thirty days before Day Zero with her past life memories intact and an upgraded Unlimited Subspace Storage System. Armed with future knowledge, Seraphine liquidates her millions, stockpiles massive reserves of food, fuel, and weapons, and hires elite contractor Gabriel Cross to fortify an untouchable subterranean compound. While her former traitors freeze in the looming cataclysm, Seraphine builds an unbreachable empire settling old scores and ruling the icy wasteland alongside a partner who earns her trust.