Eight years ago, Hu Fei, a famous art tutor in Jingnan City, was brutally killed in a classroom. On the same day, Song Xiaoyu's sister Song Xiaoxue mysteriously disappeared. The police repeatedly investigated to no avail, and the cold case was finally completed. Eight years later, Song Xiaoyu's ex-boyfriend Zhong Han took over the case in a panic. Will he find out the real murderer? Is Song Xiaoxue dead or alive?
"Tell me, is there any point in doing this?" Looking at the dark lake, Song Xiaoyu asked Zhong Han with tears in her eyes.