Anzai-gumi boss, Anzai Takashi (Koichi Iwaki), visits a jazz club run by corporate affiliate Shin-kai Yuji (Hitoshi Ozawa) to hear pianist Namura Miyako’s (Ako) performance. Miyako, who had been supported by Anzai since her youth, harbors deep feelings for him. One day, Mishima (Masaki Nishimori) from the Nakahama-gumi visits the club with a woman and becomes infatuated with Miyako, aggressively pursuing her. Despite her initial reluctance, Miyako gradually falls for Mishima. Soon after, her behavior becomes increasingly strange. Sensing something amiss, Anzai orders his men to investigate Miyako’s actions, leading to unexpected revelations…