A forbidden love story between a 50-year-old mother, Fumiko, who is treated like a servant by her husband, and her son, who pities his mother. As her son's marriage is decided, Fumiko, to distract herself from her loneliness, holds onto her son's underwear and masturbates every day. On the day her son leaves the house to live with his fiancée, Fumiko can no longer suppress the feelings she has kept hidden and takes action. For her beloved child...