In the mid-Ming Dynasty, the treacherous eunuch Liu Chong was complicity with the enemy, betraying the country and harming loyal officials. The Eighth Prince secretly investigated Liu Chong and obtained his correspondence with the enemy, planning to present it to the Emperor to impeach Liu. However, one of his trusted aides was chased by Liu's henchmen while escorting the letters. In an emergency, he entrusted the letters to the scholar Song Qian, informing him of the presence of a spy and instructing him to deliver the letters to the Eighth Prince, sacrificing himself to cover Song Qian's escape. During his flight, Song Qian encountered the pursuing henchmen but was suddenly saved by Yan Ruyu. To fulfill the dying wish of the courier, Song Qian decided to follow Yan Ruyu for his own protection. Jiang Fengyang and his master Lin Cheng discovered Song Qian's examination pass at the scene of the courier's mission. Commander Zhao Xian realized that the courier didn't have the letters on him and understood that the courier had given them to Song Qian. To prevent more people from knowing about it, he insisted that Song Qian was the true culprit behind the murder of the courier and ordered Jiang Fengyang to pursue him vigorously, hoping to protect the letters in Song Qian's possession from falling into the henchmen's hands. Liu Chong was furious to learn that his henchmen had failed, personally dealing with the subordinate who did not complete the mission. His adopted son Liu Xun took the initiative to offer himself, wanting to retrieve the letters from Song Qian's possession for Liu Chong. Yan Ruyu unexpectedly heard Jiang Fengyang interrogating Song Qian. ...