Se-hyun, who visited the body organic field with Chung Hyun, recalls the traces of his dead murderer, Yoon Jo Kyun. Meanwhile, after visiting Yongcheon site, Oh Min-ho, the team member of Se-hyun, continues the absence for a few days.

Chung Hyun, who arrested an innocent citizen as a suspect, is hit by the media, and Se-hyun, who helps him, announces a serial murder. Se-hyun, who reveals his existence to Cho Kyun, tries to stimulate him and pull him over the surface.