The origin of the drugs is revealed. Dong-jae suspects Chan-hyeok or Gyeo-re in Yoo-ri's death. Dong-jae requests an arrest warrant for Chan-hyeok. Geum-ho escapes, with dire consequences. Wan-sung traps Chan-hyeok. Dong-jae discovers a dead body.

A forensics team believes Mr. Kang's assailant was injured. Dong-jae suspects the bowling alley owner. Nam Wan-sung captures Chan-hyeok. Dong-jae requests a search warrant for the bowling alley, uncovering a scam. Gyeo-re is released.

Byung-gun finds Kang's car near a seaport. Dong-jae arrests a drug maker. Yoo-ri and Mr. Kang's killers are identified. Dong-jae's success is short-lived, and he's suspended. Dong-jae and Ji-hee investigate a missing worker.