In Anning County on the Daning border, Ye Fan acted as the county administrator for three years, transforming the dilapidated border town into a thriving market where the people lived in peace. Traitorous princes in the court colluded with external enemies from Xizhao to plot territory cessions and rebellion, and secretly withheld imperial documents and embezzled border army rations, attempting to pin all the blame on Ye Fan. Empress Wu Linghan traveled incognito to the border to investigate the case. To lure out the mastermind behind the scenes, Ye Fan intentionally accused himself under the guise of a 'fake magistrate,' laying out schemes step by step. Facing assassinations, framed charges, and the crisis of troops outside the city, Ye Fan joined hands with Constable Tang Xuerou, cooperating with the Empress to uncover the truth of the grain case, crush the rebellion plot, repel external invaders, and fiercely protect the safety of the people throughout the city.