Kyou Kuroshi, a leader of policeman, he always serious when it's comes to works and crime alert, he is always serious, cold and scary, even though he's scary he always finish all the works and crime that happened in the country, but there is only one infamous criminal that he never able to catch, the criminal gender and name is remain unknown, but the criminal always use a mask to hide their face, and it's Kyou duty to catch the criminal and sees who's behind that mask.