The drama tells the story of a lawyer who doesn't believe in the law and uses his fists to solve problems. In order to avenge his mother, he stands alone in front of the justice court and fights against the lawyer who has omnipotent power. This is a court action drama that depicts a lawyer who runs only for revenge and describes his revenge and growth. Lee Joon-gi plays Bong Sang-pil, a lawyer who stabs those in power. He witnessed his mother's tragic death when he was a child, and then because of grief and anger, he regarded revenge for his mother as the purpose of life and an absolute mission. Seo Ye-ji plays the role of Ha Jae-yi, who is very dominant and opinionated in everything she does. She was originally a lawyer, but because of the brutality against the judge, she became the chief clerk. After becoming the chief clerk, she met Bong Sang-pil and became the central figure of the incident. Lee Hye-young plays Cha Moon-sook, the respected "Mother Theresa" in the legal community. Although she is an absolute queen, she is a person who monopolizes all kinds of power, desires and the embodiment of evil. Bong Sang-pil appeared in front of her, and she began to waver. Choi Min-soo plays the role of An Wuzhou, the chairman of a chaebol who is ambitious for power and desire. He hides his shameless past and extremely bad nature, and is a complete scheming man.