42-year-old Tae Fujiwara lives with her civil servant husband and their introverted, pubescent son. Her marriage has become emotionally distant, with no intimacy between her and her husband. Meanwhile, her son has recently begun obsessively sniffing her underwear and indulging in lewd fantasies, viewing his mother as a sexual object. One day, he accidentally discovers Tae pleasuring herself, leaving him deeply shaken. Overcome by the sight of his exposed mother, he begins acting out his long-held fantasies, forcefully pursuing her despite her resistance. As their relationship takes a dark turn, the story intricately portrays the shifting psychological and emotional dynamics between mother and son. A profound and shocking narrative exploring the fragile boundary between familial bonds and sexual desire.