Bodyguards and assassins tells the story of a group of revolutionary volunteers, businessmen, beggars, coachmen, students and gamblers. People who fought for the protection of Sun Yat-sen from all directions during the period of 1906+00 and 15 in Central Hong Kong under the double pressure of the Qing government and the British government.

Donnie Yen plays gambler Shen Chongyang.

Li Liegong plays the killer Sa Zhenshan.