Dongjae, The Good or The Bastard

Episode 8 (1x8)

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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.