Shin Young-joo (Lee Bo-young) is a charismatic female section chief police officer who is passionate in her career. With her family facing financial difficulties, she has to undergo the agony and pay debts for her family. She speaks harsh, but has a heart of gold. Lee Dong-joon (Lee Sang-yoon) is a virtuous elite judge, brilliant-minded and warm-hearted, and has willingness for weak people who need a listening ear. Both of them join alliances together to uncover defense industry corruption at Taebaek, the nation’s biggest law firm, which turns out to be one of the top scandals ever.