After her husband became a vegetative patient, Miho grew obsessively attached to her son. She maintains strict weekly sexual routines, her obsession deepening each day. Unable to endure this abnormal life any longer, her son finally rebels—angrily defying her for the first time. His sudden defiance triggers an intense, unnatural excitement within her. As her reason crumbles, her possessive desire twists into madness. This passion becomes her only salvation.