In 1944 Chang Chin's father was murdered by the Japanese with the help of Ching Tang and Fan Hsi-Shang, two collaborators led by Fung Mu. Now a grown up and a master of kung fu, Chang is ready to revenge his father.
A student protester is injured when police break up a demonstration. He is aided by a prostitute and falls in love with her despite their age difference. His employer know the situation but his daughter loves the student. He comes up with a plan to reveal the prostitute's past and publically humiliate her.
