Yayoi Kusakabe is a beautiful woman and a self-aware masked able to talk and think on her own. She wears a blue police uniform with a pair of black stilettos and has a whip she wisely uses in combat. She is also able to catch bullets directed at her. She is an extremely sadistic woman, interested only in her own amusement. Her young son, Uzuki, is desperately looking for help to save her from the mask's influence. Since her former master Mamoru died, her purposes and goals are now unknown...