Mami is a devoted wife who makes a living by working as a taxi driver while supporting her husband who is fighting an incurable disease. She is troubled by the high cost of medical treatment recommended by his doctor. One day, a wealthy regular customer offers to cover the medical expenses. In order to pay the bill, she gives in to him. He gives her sex lessons every day. Gradually, Mami begins to indulge in her own pleasure. Her husband is unaware of this.