In a mansion where men gamble with high stakes, a woman arrives. Her name is Nao. A high-class prostitute called to entertain the mansion's owner, Ozawa. After the party ends, Nao approaches Ozawa, who is alone, and a ring is on her left hand. She is a married woman. Ozawa initially shows no interest in such a woman, but gradually, his body and soul become captivated by Nao's sharp gaze and the lewd provocations emanating from her provocative body. Little does he know that this is a scenario of one woman's revenge...