Tetsuo Tosu never expected his daughter, Reika, to be a victim of domestic violence. Suspecting that her yakuza boyfriend, Nobuto Matori, is the perpetrator, Tetsuo decides to investigate him and his associates. But as he searches for evidence at Reika's apartment, the father learns that his daughter is not the first victim and that a worse fate awaits her. When he is discovered by Nobuto, Tetsuo ends up killing him...