The magistrate of Yongning County in the Dayu Dynasty. Is there unruly people in the poor mountains and rivers of this county? No, it is a case of injustice hidden in the poor mountains and rivers. The clan forces here are deeply intertwined and corruption among local officials is rife. Modern legal thinking (procedural justice, priority of physical evidence, psychological profiling) + "Dayu Law" (a law that was shelved because it was too idealistic, but the protagonist planned to use it as a weapon).