Satomi, a devoted wife supporting her husband in his battle with a serious illness while making a living as a taxi driver, is advised by doctors to undergo expensive medical treatment and is in despair. One day, a wealthy regular customer offers to pay for her husband's medical expenses. In a desperate attempt to pay off the mounting bills, she agrees to his offer, leading to daily perverse sexual guidance. Gradually, Satomi begins to indulge in her own pleasure. Her husband remains unaware.
