Duel

The Dark Secret (1x3)

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Deuk Cheon and Sung Joon escape from the police and make their way to Busan. Sung Joon tries to find the homeless guy who gave him the ticket to Seoul. Meanwhile, Prosecutor Choi decides to carry the investigation in secret. When Deuk Cheon and Sung Joon reach Busan, they find out where Soo Yeon might be hidden.