Jiang Guoyin

Young Dee Renjie arrives in the empire's capital to join the Supreme Court as police judge of his region. He wants to become a prosecutor. Empress Wu, who is at the beginning of her reign, has commissioned the fierce detective Yuchi to investigate a sea monster that stalks the city at night and makes it unsafe.

Zhan Zhao is a court officer who learns of a plot to assassinate Judge Bao. While on holiday he meets a young man named Bai who turns out to be a woman. Zhan Zhao tries to recruit Bai to help him stop the assassination of Judge Bao.