Three young martial arts brothers, played by Chi Kuan-chun, Alexander Fu Sheng and Leung Kar-yan, go in search of fellow patriots dissatisfied with Imperialist foreigners and wind up joining a rising sect of the Boxers, led by an opportunistic conman. Named as such for their use of martial arts, these boxers are revolutionaries who believe that spirits protect their bodies from foreign guns. They even dupe the Empress Dowager, who gives them her royal blessing to fight the foreigners.

Set at the time of Italian explorer Marco Polo's historic expedition to China ,during the reign of Monogol ruler Kublai Khan, it stars American actor Richard Harrison as Polo. Taking considerable liberties with the historic record, the film has Polo turning up as an Imperial Inspector assigned to root out Chinese rebles in the south, but eventually being won over to their cause.