It’s easier to live alone—nature will easily feed a small settlement. But the catastrophe threw the Earth people into a bad place: here the main enemy isn’t nature, and a tiny army isn’t enough to fight it. Settlements burn, lines of prisoners disappear without a trace into the lands of the enemy, the Hai-tan fleet shows all its power. The question of unification becomes a matter of survival—but solving it isn’t any easier than dealing with a Hai-tan army.