Ten years after the nuclear blasts, the warlord White Crow rules as a dictator in the name of technology. Engineer Chen Li awakens a self-repairing smart city called Ark amid the ruins and becomes its lord, but is forced to power the city at the cost of his own lifespan. Hacker Qin Mo infiltrates the city on White Crow's orders, but after seeing the vitality of its civilian population, he switches sides and becomes an ally. Together, they rely on the city's defenses to fight off looters while investigating the truth behind the nuclear blasts. But White Crow's army is closing in, and secrets lurk within: medical worker Su Wanqing's hidden past, the shadow of betrayal cast by mercenary Iron Tower, and the deadly code held by the orphan Xiaoman. How much hope can one city protect? Chen Li must choose: sacrifice himself, or sacrifice someone else.
