Go Da Kyung is an eager rookie investigator who gets paired with the famous forensic doctor, Yoon Ji Hoon. They initially clash due to their different styles of investigation as well as their opposing personalities, but later develop a complex relationship as the two strive to uncover the truth through science.

Chief of the ‘Special Crime Unit’, OH Gu-tak, looks for the former gangster, PARK Woong-chul, whom he had worked with before, and recruits a con artist, KWAK No-soon, and a convicted cop, KO Yoo-sung in the new team. With new blood, the ‘Bad Guys’ have become stronger and tougher. As they dig deeper into the case, they sense that a much bigger crime organization is behind it all and they begin the hunt for bad guys…

Heo Im is an oriental doctor, acknowledged as the best in acupuncture and moxibustion in Joseon. His success is blocked due to his low status. One day, Heo Im travels though time and finds himself in present day Seoul. He meets Choi Yeon-Kyung. She is doctor firmly believing in only modern medicine.

Born in a poor family, Tae-su learns that the power is the most important thing in life and decides to become a prosecutor, the biggest symbol of power in the 90’s. After entering the most prestigious law school, experiencing democratic resistance in Korea, Tae-su finally reaches his goal of becoming a prosecutor but his life is no better than a salary man. By chance, he joins a clique of the powerful prosecutors with wealth and authority. He finally gets a taste of a life of the top hierarchy, but as he enjoys the sweetness of supremacy, he also sees the cruel side of it.