ICAC Chief Investigator Jiang Jianqiu approached the key figures in the listed company corruption case as a prospective mother and found a loophole to solve the case. Chief Investigator Szeto Kai-man took Assistant Investigator Ding Xin to pretend to be a father and daughter to buy a house during the investigation of the maintenance tender case. With the help of gun team member Xu Haonan and Assistant Investigator Zhong Qiaoling, he successfully persuaded the key figures to collect evidence of the construction company involved. Senior Investigator Wu Xuebin used IT knowledge to find out who in prison was communicating with the outside world and successfully cracked the corruption case of correctional personnel. Even though Qiao Ling and Ding Xin have different opinions on the people involved in the middle school engineering corruption case, and they were even stopped from contacting the case because they knew the people involved in the insurance bribery case, their strong sense of justice and mission did not stop them from moving towards the goal of finding out the truth.