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.

Nam Wan-sung pleads not guilty, but a recording exposes him and his slush fund. Dong-jae joins a new team to root out corruption. Mi-ran is suspended, Ji-hee takes on her role, and Gyeo-re admits his crimes. Wan-sung is imprisoned with Kyeong-hak.