At the funeral, Yun Ye kneels before the coffins of his adoptive parents when a prompt suddenly appears from the System: [True Young Master's identity activated. Apocalypse countdown: 72 hours]. He was once an abandoned orphan, but now he bears the secret of a trillion-dollar genetic weapon. Standing behind him is Li Zhuo, the "adopted son" entrusted to his adoptive parents before they died, and the only person who can awaken the apocalyptic factor inside him. When radioactive storms sweep across the city and zombie hordes tear civilization apart, Yun Ye discovers that Li Zhuo's blood can suppress the virus. But Li Zhuo has known all along that he is a genetic vessel. One bears the truth of his identity, the other carries the burden of fate. In the crucible of the apocalypse, they must uncover who is truly "human."
