Se-hyun installs a temporary autopsy in Yongcheon and chases traces of the bacteria. That night, Se-hyun finds a third carcass in front of his studio. Se-hyun tells Cho Kyun, who celebrates his birthday, and tells him to start playing in the future.

Jung Hyun's investigation expands to the "Cheongwoon Port Incident", where Se-hyun and Cho Kyun were together. In the investigation situation, Se-hyun suggests that Cho Kyun is making a fake criminal. However, Sehyun falls into a trap from the address sent by Cho Kyun.