Kim Seung-cheol dies in car accident, but Jo Tae-sik suspects it was suicide.

Tae-sik looks into Sang-hun's disappearance; Sang-hun abd Seung-cheol were working together.

Tae-sik investigates when a factory worker he had been trying to find turns up dead; Seo-hui forces herself through a tough campaign trail.

When another gory package surfaces, Tae-sik and his team think Dong-gu is involved; Seo-hui attempts to understand a bill that her party wants passed.

Suspecting something is amiss at the mental hospital, the cops send Jeon Ho-gyu undercover; Seo-hui eavesdrops on Hong Min-guk and Dong-gu.

Tae-sik untangles the mystery of the mental hospital, but Sang-hun remains missing; Seo-hui confronts Jeong Yeong-mun about what he knew.