In Yongcheon, a carcass with a thread is found, and the identity of the body is found to be the missing team of Se-hyun. Se-hyun, who discovered the same technique and clues in the second body, feels that the bacteria are back.

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.