Five years ago, Su Changqing, the world-renowned legal demon king, chose to retire to live a peaceful life with his wife and daughter. Instead, he discovers that his wife, Chu Miaoxue, has been unfaithful and even condoned her first love's son in bullying their daughter to the point of falling from a building and suffering severe injuries. Enraged, he divorces her and returns to the legal world to seek justice, only to find that his wife has colluded with the murderer, hiring lawyers, forging letters of forgiveness, and obtaining an "impotence" certificate in an attempt to overturn the case.