The Criminal Investigation Team 9 of the Beijing Public Security Bureau is a team that dares to fight hard. Captain Chen Wei faked his death and went undercover because of a supernatural case, and team member Zhang Qian took over the post. Later, the ninth criminal investigation group was wiped out in an operation, and the superiors decided to reestablish the ninth group. After the reconstruction, the ninth group's combat effectiveness was greatly strengthened. It was not only responsible for ordinary criminal cases but also various supernatural cases. He was able to destroy evil organizations with supernatural incidents one after another, and he was also very good at handling ordinary criminal cases. After everyone shed their lives and blood, the people of Jingbei City are protected by this group of people. They also lived up to their trust and reorganized the Nine Group. Together they solved a murder case. Team member Chen Liang died. Chen Liang's posthumous son inherited his father's mission and eventually became the leader of the Nine Group.