Ju Won has no idea why Dong Sik had to become a monster and keeps suspecting Dong Sik, even while working the case together. Meanwhile, Dong Sik becomes flustered when an unexpected person decides to interfere in the case. When Ju Won finds Dong Sik's weak point, their relationship takes a surprising turn.

Ju Won is back after his leave to not Seoul but to the Manyang Police Station. As soon as he's back, he keeps his eyes on Officer Lee to dig deeper into the real cause behind Kang Jin Mook's death. Meanwhile, many bodies were found at a deer farm.