With the advent of the apocalypse, Mu Chang's life path took a different turn. As a merciless assassin for his clan, his sole objective was to safeguard Miss Bai. Unfortunately, she was turned into a zombie due to a catastrophic event, leaving Mu Chang despondent and considering taking his own life. Suddenly, the apocalypse system within him activated and presented him with a novel prosthetic arm that endowed him with incredible abilities. He was able to manipulate and communicate with Miss Bai via his cybernetic appendage, a stunning development indeed. Together, Mu Chang and Bai Zhi embarked on a fight for survival during the final days, determined to restore her to her former self.