Mako Oda shares a home with her husband, but their sex life is dead. When a young insurance salesman visits, she feels a spark, and her husband's jealousy only drives the marriage further apart. Mako turns to the salesman, and soon they are having sex even while her husband sleeps upstairs. Then the salesman's senior colleague comes looking for her too. Her husband finally catches her consumed by the affair—but what answer will Mako give him?