When Seol Qiang-woo and Jung Soo-in sought refuge from the cornerstone, they accidentally revealed the true identities of Kim Chul-min and Detective Kang - they were parasitic beasts.Jin Zhemin has quietly sneaked into the police station and colluded with the gray troops. Only Detective Jiang knows about this.Chief Choi Jun-kyung was eager to let the public know about the existence of the monster, called on the public to report the crime, and launched a comprehensive clean-up operation.This task must be completed before the Pengmul Festival, because the opening ceremony of the Choi Yongjae Memorial Hall will be held.Seol Kyung-hee learned about Seol Qiang-woo's meeting with Ji-suk from Jin-hee's cell phone, and Jung Soo-in firmly believed that Choi Jun-kyung must be made aware that the monster has infiltrated the police.Although Seol Qiangyou was worried about not being able to identify the monster, Zheng Xiuren firmly stated that he would not back down.

Kim Chul-min and Detective Kang deliberately revealed the new stronghold of the parasitic beast to Cui Junjing. Although the clues seemed direct and suspicious, Cui Junjing chose to believe it because of time constraints and began to prepare for the eradication operation.Jung Soo-in revealed the true identities of Kim Chul-min and Detective Kang to Choi Joon-kyung, but Choi Joon-kyung proposed to cooperate with them.Xue Qiangyou learned Jin Xi's dying information from Ji Shi, which made him feel guilty for his evasion.In the city, Xue Qiangyou rescued Zheng Xiuren who was being hunted. Heidi was dissatisfied with Zheng Xiuren's behavior, but Xue Qiangyou understood that this was her way of survival.While Seol Kyung-hee was searching for Seol Qiang-woo and Jung Soo-in, Ji-suk sacrificed his life to protect them.Choi Joon Kyung was suspicious of Jung Soo In's warning, but still agreed to record it in case of emergency.The success of the sweep operation confused Jung Soo-in, while Choi Jun-kyung became even more suspicious of her rhetoric.Xue Qingxi discovered that the priest had betrayed his kind, and Xue Qiangyou guessed that the leader of the parasitic beast was targeting the mayor.