Before the Ming Dynasty in Chang'an

Prime Minister Wu Yuanheng was stabbed to death on the street outside Jing'anfang in the early morning of June 3, the 10th year of Yuanhe, and his head was cut off, which shocked the government and the public. Lu Yun, the young judge of Dali Temple, as a disciple of the Prime Minister of Wu, was ordered to assist in the investigation openly and secretly by the emperor, and vowed to find out the real culprit.