When the chief judge blurted out "Sir" to a criminal defense lawyer who was despised by the whole city during the trial, all the wealthy people in the room stood up and bowed - because that address was the ultimate certification of legal dignity. Jiang Yan, a "crazy lawyer" who was once abandoned by the system, returns to the court with an erased parricide case; Shen Zhiyao, a female judge who adheres to procedural justice, has to form a dangerous alliance with him. Qin Shaoting controls capital, Lin Wu hides the key, Zhou Yanqiu deduces fate, and Chen Huairen forgets the truth. Every court trial is a game of life and death; every win brings a layer of truth to light. When the law becomes a weapon, who is the real sinner?