Cao Jin found that Ning really had the talent for criminal investigation, so he applied to his superiors to second him to the Criminal Investigation Detachment of the Municipal Bureau and restarted the case of naked corpse in Cangbei.Cao Jin and Ning Zhen asked Luo Yin but failed. Ning Zhen asked Lu Fan to find out the case of Cangbei's naked corpse.Ning Zhen analyzed that the anonymous reporter of the Cangbei naked corpse case is likely to know Luo Yin.

Through Luo Yin, Ning Zhen Lu Fan learned the identity of the mysterious reporter. It was Zhang Jianmin, the thief who Luo Yin had contacted when he was serving psychological counseling for prisoners.However, when Ning Zhen and Lu Fan rushed to the pork shop, Zhang Jianmin was already killed, and the “abyss ” symbol was left on the ground again.