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.

During the Ming Dynasty one man will request a competition when his weapon is rejected. After a series of fights he is determined to prove his sword is invincible.

The story follows two childhood friends as they go back in time to try and prevent the suicide of their other best friend.