Xue Qiangyou repaired Jin Xi's cell phone, hoping to find clues to the connection between his sister and Ji Shi.However, Jishi also couldn't contact Jinxi, which made Xue Qiangyou anxious.The owner of the mobile phone store revealed that someone has been looking for Xue Qiangyou recently, and the news quickly spread to the ears of the gangsters in Yeongdeungpo.After a fierce chase, Xue Qiangyou contacted his gang partners and reported the situation.However, he decided to stay here and continue to search for the mysterious church and the whereabouts of his sister.

At the same time, Cui Junjing's fan Jiang Yuanshi became very interested in the work of the Gray Team.After learning that Cui Junjing hopes to contribute to mankind, Jiang Yuanshi hopes to join the Gray Team to help find parasites.The report provided by Jiang Yuanshi mentioned the attempted murder case in the supermarket - the Jung Soo In incident.Jiang Zhemin began to suspect that Zheng Xiuren was related to parasites, so he secretly pulled out her hair for examination.Jung Soo In felt the presence of brain waves, but tried his best to stay calm in front of Jiang Zhemin.

One night, Zheng Xiuren was taken away by people from the church.The parasitic beasts need talented ones like her to teach everyone to imitate human expressions.Xue Qiangyou happened to come to the church for surveillance and witnessed Zheng Xiuren's arrival.In the church, Zheng Xiuren learned that the police had captured their kind as bait and captured a parasitic beast at the music festival for study.The priest believes that the strength of humans lies in their willingness to sacrifice for the organization. This is loyalty to the organization and the reason why humans are stronger than parasitic beasts.

Parasites cannot reproduce, so they must create organizations like humans and contribute their abilities.This is the only way for them to avoid being slaughtered by humans and survive.Xue Qiangyou came to a warehouse next to the church and found that it was filled with human bodies, including his sister's body.Shocked and grieved, he immediately took up arms to attack the parasitic beasts that came to the warehouse.The huge noise attracted the attention of the parasitic beasts in the church, and the priest ordered them to hunt down the human.The pastor also noticed something different about Jung Soo In because she seemed to have emotions.

In the chaos caused by the parasitic beast's attack on Xue Qiangyou, Xue Qiangyou escaped with Zheng Xiuren.A parasitic beast chased Xue Qiangyou, and Xue Qiangyou mistakenly thought that Jiu Min was here to help him, but later found out that Jiu Min was the one who tipped off and wanted to kill him.In the fierce fight, another parasitic beast joined in, making the argument between Xue Qiangyou and Jiu Min even more intense.At the same time, the parasitic beast in Zheng Xiuren's body appeared and started a duel with the parasitic beast that came over.In the end, Xue Qiangyou's car got stuck in a tree and was about to fall off the cliff.After Zheng Xiuren woke up, she decided to save Xue Qiangyou. The parasite in her body came out to save Xue Qiangyou to ensure her life safety.At the same time, Choi Jun-kyung discovered the secret that Jung Soo-in was a parasitic beast.