 In Canton, the master of a kung fu school dies and his seemingly lazy and undeserving son, Fei-hong, inherits. In the British commercial sector, an opium den opens with the bribed approval of the city s weak mayor. A merciless Japanese swordsman is challenging and killing the best fighters from every kung fu school. Fei-hong, who has fallen in love with the foreign swordsman s sister, must rid the city of the opium den, face down the hired guns of the British, establish his moral and physical authority to run the school, and meet his lover s brother in a dual.