Монстр: По той бік зла

While Dongsik and Juwon are having dissonance on the body, both Dongsik and Juwon suspect each other. However, then they encounter a scene that they cannot believe their eyes.

Manyang is filled of horror and sorrow after multiple cases of murder. Dongsik shows suspicious actions during the investigation, and Juwon faces challenges. However, the situation reverts after a new evidence is found.

Juwon tries to find the critical evidence to confirm Dongsik's guiltness while focusing on Dongsik's arrest; however, Dongsik gets help from an unexpected person. Yet the public opinion against the investigation maddens Juwon and Dongsik.

Juwon's press conference shocks the world, but the situation does not favor him. Whereas Haewon and Changjin force to take on the event featuring Jinmook who lost his daughter. Juwon threatens Dongsik with a new secret yet Dongsik coattails him.

Jinmuk watched Minjung at the day she was missing. Dongsik and Juwon privately investigate the case, yet the situation does not help them. Dongsik decided by himself.