Shen La, a special investigator with the "Poll Bureau" of a mysterious incident management agency, is seriously injured while carrying out his mission. As he nears death, he accepts the inheritance of Wu Rendi, director of the Sixth Office—a "seed" holding mysterious power. After regaining consciousness, he is taken on as a disciple by Wu Rendi's senior brother, Guangren. To find the fragments of the Tianli Diagram, Shen La endures incidents such as the Tianshan Wolf Tomb, energy backlash, and foundation conspiracy. He is eventually recognized by Wu Rendi and receives an ancient artifact from him: the Twin Swords of Crime and Punishment. Meanwhile, the issue of an insider within the Poll Bureau grows more complex and confusing, prompting Shen La and his partner Sun Desheng to go into battle once again.