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.

A young girl with magical powers is trafficked to Shanghai by her smoke-addicted parents to become a dancer. She became famous in the French Concession with her iron fist. She became famous in the French Concession for her iron fist and became a person of high moral standing.