On a typhoon day, after Lone Wolf massacres the entire 601 family, he encounters Xia Yin and her mother in the elevator lobby. Suspecting that Xia Yin and her mother witnessed the crime, he goes to their home to question them, while actually intending to commit another murder. Xia Yin has experienced several death loops, each ending with her being killed by Lone Wolf. Eventually, she makes a judgment based on her past experiences, but fails to save her mother and is left permanently disabled. By chance, Xia Yin experiences another death loop and returns to the scene before the crime. This time, she reacts quickly and ultimately sets a trap to kill Lone Wolf, Liang Yu, in retaliation.