Where there is light, there is darkness. In this city, they are the messengers of justice who fight against gangsters. As a girl who experienced great changes in life, she met him again, the one with whom she used to share a wonderful past. Being completely different from each other, they need to work together. He is a detective and she is a criminal policewoman. She really doesn’t know what to do with this rascally detective! But it seems that there is further progress with his help!? In the investigation of each case, she seems to change her attitude towards him...