Separated from her husband and living apart, the mother finds their relationship growing distant. Though recently overwhelmed by intense sexual desire, she has no intention of cheating and instead indulges in solitary masturbation. In her forties and still youthful, her body easily stirs with lust, and her only comfort becomes her son. Unable to suppress her taboo desires, she gradually enters into a forbidden relationship with him. Their impulsive emotions and physical intimacy form the core of this story.