Hyung In hears from Jung Hyun that she saw Jae Young at the place where Youngjingyo believers hold their rite. When Hyung In meets Kyung Ho at the prison, he hears something shocking. Meanwhile, Jung Hyun is taken by mysterious men and meets Im In Gwan.

Jung Hyun turns down In Gwan's offer and starts looking for leads with Yong Tak again. Meanwhile, Hyung In is put in a tough spot as Kim Hwan Kyu tells the press that he was tortured during the investigation. Hyung In also hears a rumor that there's a video tape named "Mixed Tape" circulating in Saju City and that those who watched the video are saying strange things.

Hyung In heads to the Cheonyang Filtration Plant to stop the disaster that is about to occur in Saju. But he becomes tied up by the Youngjingyo believers. There he hears that another gas terror attack that's similar to that of 1987 is about to take place. The people in Saju start to flock around the filtration plant as if they're possessed by something.