The mother suddenly visits her son's apartment where he lives alone. Though the son has become independent and started living on his own, it is actually the mother who struggles emotionally, unable to let go. Her presence gradually stirs something inside him, and he begins to recognize feelings he has never acknowledged before. The mother's full breasts, her softly rounded back—every detail unsettles the son, awakening emotions he has never experienced. An affair forbidden by blood unfolds, shattering the tranquility of their quiet lives. Inside the small, confined room, the illicit sex between mother and son becomes a shocking moment, marking the beginning of a taboo passion.