After losing her husband, Chieko lives alone with her son. As her son grows older, Chieko begins to rediscover her identity as a woman. One day, her son's friend comes over to visit. With no mother of his own, Chieko agrees to play the role of a mother for just one day. When she visits his home to take care of him, Chieko finds herself overwhelmed by emotions she can no longer suppress. Long-forgotten desires stir within her body as she becomes increasingly drawn to his youthful presence.