When you combine "Kung-fu" Liu Chia-liang with the greatest kung-fu film character of all time, Huang Fei-hung, you get one of the finest "pure" kung-fu films ever made, with martial arts mastery in every scene.
A Kung Fu master finds out that an opium den is destroying the lives of the town he lives in, and vows to put an end to the den, but first he must try to defeat the strongest enemy he has ever faced: his addiction to the drug itself.
During the shut down and destruction of the Japanese test camp Squadron 731 in Manchuria, a soldier becomes infected with a virus developed during the camp's testing and risks spreading it into Japan on the train ride home.