The story is based on the historic martial art legend Hung Hei-gun (Donnie Yen) in the Qing dynasty. In the final stand Hung Hei-gun and Fong Sai-yuk (Nick Cheung) fight their way to defend the Shaolin Monastery against the invading army of the Qianlong emperor who was trying to get rid of oppositions. Qianlong was also afraid to reveal that he was not a true manchu.

Yang, a thief, witnessed his adoptive father's murder and vows to avenge his death after stealing a jade buddha with Hong. He meets Mu, who helps him escape from the authorities and they fall in love. Yang has a change of heart after meeting Da Mo and works to stop Mu from taking the throne.

Kung fu has a long history in China, with many different schools, such as Wudang, Shaolin, Wing Chun, etc. Each episode of this RTHK documentary series interviews a grandmaster of different style, where they demonstrate actual combat and discuss the nature of their martial art.