A famous businessman's links with organized crime are looked into by the Zero Division of the Tokyo Police, with the investigation being headed by a highly trained, extremely violent and very beautiful female officer. When not having shoot-outs with the crime syndicate thugs trying to kill her, she spends most of her time in her apartment, wearing lingerie and taking showers. A sub-plot involves the businessman's S&M-obsessed daughter.
Kekko Kamen, the fearless heroine who wears red boots, a red mask, and nothing else, she has an uncanny way of destroying her opponents by stunning them with her private parts and proceeding to kick their butts.
Ichijoji is a street punk who stumbles across Mari and her cat. Mari and Ichijoji immediately fall in love but are chased by both yakuza and corrupt cops.
