While Ji Hyuk manages to survive the ambush by Oh Jong Tae, the prosecution adds more pressure to Do Chang and his colleagues, invalidating their efforts to bring Oh Jong Tae down. Do Chang however continues to put pieces together and stumbles upon a crucial link that connects Oh Jong Tae to his evil deed. Meanwhile, Seo Gyeong finds out that her boss, Yoo Jeong Seok, was at the murder scene five years ago.