Lung is a talented fighter but prefers to spend his time loafing around and picking fights, despite orders from his grandfather not to fight. Unknown to him, a brutal general has been slaughtering all the people from his grandfather’s clan. When the general recognizes Lung’s style of kung fu during one of his street fights, he hunts down Lung’s grandfather and kills him.

A pair of evil kung-fu artists, Heaven and Earth, are slaughtering the entire Yin-Yang brotherhood.