Do Yoonshin is a lawyer who has spent his career defending the powerless. Justice is not just his profession, it is his entire identity. So when his older sister Ikyung, the only family he has, urges him to take a position at Doguk, one of the country's most powerful law firms, he hesitates. She insists the experience will pay off in the long run. Reluctantly, he agrees, even though landing the job through connections leaves a bitter taste in his mouth. His new boss is Kang Sehun, a celebrated partner at Doguk. Sehun is a pragmatist who bends the rules whenever it suits him, trading favors behind closed doors and taking shortcuts without a second thought. The two men recognize immediately that they are nothing alike. Yet neither has a choice but to make it work. Can two people who stand on opposite sides of everything find common ground? Or will their clashing ideals destroy them both?