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.

In the late 1980's Shanghai, a 16 year-old boy, Xiaoli, comes of age surrounded by his neighbors and grandfather. His best friend is a girl named Lanmi, a couple years older than him. But Lanmi slowly drifts away from him, lured by the new opportunities which come as China opens up to foreign goods and businessmen. At the same time, the 1989 events force Xiaoli to grow up and to let go of his teenage dreams.