“An interesting woman is here tonight... look, that woman in black, don't you recognize her?” “Wasn't her husband... killed?” “With that beauty, you can tell even through a mask. Former model Ichika Hoshimiya. The trophy wife of the nouveau riche Yoichi Sejima. He used to show her off when he was alive (laughs).” This is the dark zone around Minato Ward, an underground casino. Ichika, who became a widow after her IT tycoon husband was murdered, was addicted to the hedonistic thrill of gambling she experienced while he was alive. However, after meeting the up-and-coming female novelist Yoko Azuma, she begins to awaken to the world of sadomasochism...