The story of the villainous lawyer Kang Han Su, who files premeditated lawsuits and exploits the feelings of his wronged victims for his own gain, while unwittingly becoming revered as a hero and problem-solver among the common people. Eventually, he matures into a truly just lawyer. Kang Han Su is a skilled lawyer of the Joseon era. Kang Han Su defends and bends the law to seek revenge, but eventually becomes the voice and hero of the people. Yi Yun Ju is someone who commissions a case to seek revenge.