When his pregnant wife is hospitalized, a man begins living alone with his mother-in-law. The sight of Ayako working in the kitchen, hanging laundry and moving through ordinary daily life gradually awakens his desire. Her soft smile and sensual manner keep stirring his mind and body until he finally blurts out, “Are you trying to seduce me?” That one question breaks their restraint, and Ayako also forgets the boundary between mother-in-law and son-in-law as they surrender to a single forbidden night.