Su Chil finds out about Jong Sam's real identity. As a result, Jong Sam leaves the Hidden Crime Team, and Jin Young worries about Jong Sam. Yoon Su tells Su Chil that he can't arrest Jong Sam just yet. Meanwhile, Pil Sung tries to use Mr. Cha, who is the only person who has evidence of the Odong Blowfish Murder, as a means to benefit himself.
수칠에게 정체를 들킨 종삼은 암수반을 떠나고 진영은 그런 종삼이 마음에 걸린다.
한편 장필성은 오동 복집 사건의 단서를 가진 차집사를 이용해 상황을 전복시켜보려 하는데..
