The principal tricked and kidnapped the female student Tongtong with an orange cat. Xueer was blackmailed by Deng An when she asked for help from Ding Luofeng.Ancient children's bones were found in the garbage dump, and Ding Luofeng locked in the suspect area of the East District of Hong Kong Island.The principal called Fu Deshan to blackmail but failed, Xing Kai speculated that the murderer was still active thirty years ago.Fu Chengshan's suicide by drinking and suicide caused Fu Yangshan's collapse, and Yang Zhifei intervened in psychological counseling.Xueer's shop was set on fire, and Haruko's investigation pointed out Ding Shaoyun's planning.The corpse identification was confirmed to be homicide. Ding Shaoyun suddenly surrendered and disappeared. The police found that he was 16 years old and had a record of death.Fu Chengshan's suicide note claimed to be the murderer, and Xing Kai questioned the conclusion that it did not match the outline of the crime.