Synopsis：In Jianning County, Song Ci encounters a case where the county magistrate has wrongfully convicted Wu Feiqing. To help Wu Feiqing clear his name and uncover the truth, Song Ci must catch the real culprit within two days. With mysterious marks on a paper fan, a missing murder weapon, and a coerced confession from Wu Feiqing, Song Ci employs his genius investigative skills to finally uncover clues related to the killer. Just then, a sudden petition leaves Song Ci speechless, as a vast conspiracy slowly unfolds before him...