The series is set in a dystopian version of South Korea, where people harbor hatred towards their leaders and live in chaos. Trials are held through a courtroom live show aired on television, where three judges come together to bring justice and peace.
Ji Sung as Kang Yo-han, a chief judge who punishes the dishonest with no mercy, thus earning himself a reputation as a hero of the people. However, he maintains a mysterious background and conceals his true motivations and ambitions.
Kim Min-jung as Jung Sun-ah, Yo-han’s greatest rival, she had a crush on him since she was younger. She was born in a low-income family and used to be a servant in Yo-han’s mansion, but now works for the Social Responsibility Foundation (SRF) and holds enough power to influence the leaders of society.
Park Jin-young as Kim Ga-on/Kang Isaac. Kim Ga-on: An associate judge on the Live Court Show, he believes in obtaining justice through constitutional means. His parents died when he was 16. Kang Isaac: Yo-han’s deceased older half-brother, who perished in a fire.
Park Gyu-young as Yoon Soo-hyun, Ga-on’s childhood friend, she is a lieutenant in the Regional Investigation Unit, who tries to expose Kang Yo-han’s secrets. She is a brave lady who believes that justice should be obtained by constitutional means. She has a crush on Ga-on since childhood.
Source & Credit : Wikipedia, TVN & Viu