The investigation by Gu Yuan and others found that Nie Xiaorui had conflicts with his three best friends in high school, Chen Huairou, Ma Yulou, and Liang Ruomin. Ma Yulou was Nie Xiaorui's driver. The factory that Nie Xiaorui ran went bankrupt, and Ma Yulou was fired and owed wages. But Ma Yulou confessed to a more suspect person - Liang Ruomin. Liang Ruomin lent money to Nie Xiaorui to open a factory, but the bankrupt Nie Xiaorui could not bear the interest and owed Liang Ruomin a lot of money. But Liang Ruomin pointed out that the reason for the closure of Nie Xiaorui's factory was the withdrawal of capital from another shareholder, Chen Huairou. It turns out that Nie Xiaorui and Chen Huairou's husband Zhao Liang were caught cheating on them. Although Chen Huairou had the greatest criminal motive, there was no direct evidence that she murdered. Soon after, Zhao Liang killed Chen Huairou as if possessed by a fox fairy. Gu Yuan and others arraigned Zhao Liang, but Zhao Liang said that he did not remember killing Chen Huairou at all. At this time, Liang Ruomin and Ma Yulou took the initiative to come forward, looking terrified. They said that they were also afraid of being possessed by the fox fairy and sought protection.