The war for survival has begun. Explosions tear through safe havens, leaving nothing but fire and ash. Patrick discovers that alliances with zealots come at a deadly price. Camilla faces the ghost of her past—and the terrible choice it demands of her. Otto realizes too late that the true enemy may not be the blind outside, but the voices festering within. And Tommy, fueled by his father’s shadow, has built a weapon that could decide the fate of them all. As the crack spreads wider across the sky, there is no refuge left. Every survivor must take a side, because the next battle will determine not just who lives—but who controls what remains of the world.