After the murder of two kung fu experts, Bruce, a Police Inspector from New Zealand, decides to get involved in the case despite only being on vacation in Hong Kong. At the scene of the most recent murder, the victim managed to tear off a Buddha pendant from the killer. The link between the two murders is the strange markings on the victims neck. Bruce retraces the victims final footsteps and the search leads him to tracking down experts in Iron Finger Kung Fu.

After avenging the death of his brother, Chen Shen (Bruce Li) returns home from Shanghai. He tells his mother (who went blind from crying over her son's death) that he will no longer fight. However, being a movie with the words "fist" and "fury" in the title, Chen doesn't keep his promise for very long. Japanese occupiers who are aware of Chen's history terrorize his family by, among other things, vandalizing his mother's store and beating up his brother. Later, they frame Chen for a murder. After the Japanese boss arrives in town and causes a ruckus, Chen breaks out of jail for a final confrontation.