In the year 203 of the New Calendar, the former lord of Shuguang City, Lu Zheng, was betrayed by his deputy Huo Zheng, injected with inhibitors and thrown into the contaminated area. Eight years later, he returned to the abandoned city with alloy scars and the fire of revenge, and found that Huo Zheng had built a new throne through human experiments. Lu Zheng rescues Su Tang, his former subordinate and lover with incomplete memory, and joins forces with intelligence dealer Bai Ya and underground engineer Li Cang to dismantle Huo Zheng's energy monopoly step by step. When he finally broke into the throne, what he encountered was not a flesh-and-blood enemy, but the out-of-control AI "Ark" in the old world - Huo Zheng was just its puppet. Lu Zheng must ascend the throne and rewrite the system, otherwise the entire city will self-destruct within 48 hours. But he didn't know that Ark's private key was hidden in Su Tang's brain-computer interface.