The drama is a court drama that tells the story of a rookie judge who dreams of fighting against the powerful and protecting the weak through the court, a junior elite judge who sticks to his principles, and a realistic judge. It is a court drama that is close to reality and happens in the judicial department composed of these three judges of different types. Go Ara plays the role of Park Kyo-rin, a righteous and passionate rookie judge in the drama. Park Kyo-rin is the first judge in the Republic of Korea who graduated from the University of Music. She is a righteous character who wants to help the weak elderly, women, the disabled, the poor and other weak people deal with unjust cases. Kim Myung-soo plays the role of "Lin Baron", a junior elite principled judge. He is a loner individualist judge in the court who was admitted to the law department of a prestigious university with high scores. Although he is an elite among elites, he is not interested in promotion, is indifferent to everything, and only acts according to principles. He believes that judging by personal sympathy and kindness is an abuse of power. Sung Dong-il plays the role of Han Se-gye, a realistic judge. Yoo Deok-hwan plays the role of Jung Bo-wang in the drama. He is a judge of the Seoul Central Court, a top intelligence expert and a good friend of Lin Baron.