Tae Oh loses a game of chicken against Mu Yeom and agrees to help catch Gap Dong. Tae Oh proposes they tamper with the DNA evidence, which temporarily puts Maria and Mu Yeom on two sides of the ethical question. They bring Chul Gon, Profiler Han and the prosecutor in on their belief that Chief Cha is the culprit as they continue to explore ways to catch him. Cha gets wind of their suspicions and makes a counter-proposal to Tae Oh.