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.

Dong-jae hatches a plan to catch Nam Wan-sung. Wan-sung plans to expose Dong-jae's past bribes, but Dong-jae posts an apology online first. The team decides to track Wan-sung to find a body. Wan-sung is questioned, and Chan-hyeok confesses.

Nam Gyeo-re's court proceedings begin. Dong-jae poses as a construction worker, suspecting the site is hiding the buried bodies. Dong-jae and Byung-gun go on a stakeout, while Ji-hee camps outside Wan-sung's house. Wan-sung is arrested.