Plot

In the 1990s, in Hechang City, Zhongchang Province, grassroots police officer Qin Chuan, through his own efforts to study and further his education, finally became a criminal police officer as he wished. After the heroic sacrifice of his master Gao Jianshe and friend Ye Maosheng, Qin Chuan became even more determined to defend justice and punish criminals. He participated in the investigation of multiple cases and gradually grew into an excellent representative in the Zhongchang criminal investigation team. The criminal investigation industry needs to cultivate new talents. The Public Security Department of Zhongchang Province specially invited criminal technology expert Cao Zhongshu to be moved by Qin Chuan's talent and dedication. The chief criminal investigation expert Wu Yingde, after strict investigation, accepted Qin Chuan as his disciple. In the process of solving difficult and vicious cases, Wu Yingde, Cao Zhongshu, Qin Chuan, Tao Weizhi, Li Wen, Zhao Fei and other three generations of old, middle-aged and young detectives worked together to cultivate a group of more modern and professional young criminal investigation officers through practical combat. The dedication and investment of front-line detectives in the field of criminal investigation also infect their next generation, achieving the transmission of police spirit from generation to generation.