The masked man told that after Detective Ben's wife was murdered, he vowed to catch the murderer and avenge himself. But at every critical moment of his struggle with the murderer, there was a mysterious masked man who beat the murderer to his knees with his superb martial arts and fighting skills.
It was not until the masked man was injured in the struggle with the gangster that she revealed her true face-a kind, honest and hateful woman; A "volunteer policeman" with extraordinary skills to eliminate pests for the people.