After his daughter Zhuoma fell off a cliff and died, Duoji has been living his life in regret and refuses to face reality. One day, he happens to pick up a red schoolbag containing Zhuoma’s personal belongings, which further convinces him that his daughter is alive. In order to find his “missing” daughter, he goes to the city of Chengdu by himself, only to get involved in an unsolved murder case.