Since the implementation of the "Violent Law", traditional triad organizations have been attacked and suppressed as never before, and at the same time, they have also changed their appearance and continued to roam in the gray area that is difficult to reach by the law in a more covert and cunning way. To this end, the police are waging an unremitting struggle against the underworld through various means. In the 3rd Division of the Organized Crime Countermeasures Division of the Metropolitan Police Department, there is a department called "Off-call", where anyone in the underworld who wants to wash their hands can call and ask for help and start a new life. Nagamitsu Maiqiu (Yuko Oshima), who works in the department, seems to have an unforgettable hatred for the underworld for some reason, in addition to using her power to help relevant personnel "get rid of the underworld", she even does not hesitate to use some unconventional means to fight underworld organizations and even ordinary citizens. Sho Mishima (played by Kazuki Kitamura), a criminal police officer in the fourth section of the group who has a lot to do with the underworld, is kicked to the point of leaving the call for letting the suspect go, and he witnesses the ruthless Mai-san's almost ruthless experience with the blackouts, and also accompanies her to attack the Kanto Kibune group led by Tachibana (Kenichi Endo)......