A record-breaking heatwave continues during the hottest days of summer. Jun, a son who has become a working adult, returns to his childhood home for the first time since leaving. He reunites with his mother, Asami, whom he hasn't seen in years. Asami, who has been living alone and quietly since losing her husband, is delighted to see Jun again. However, Jun seems somewhat downcast. It appears that Jun has been stressed out by the hustle and bustle of city life. Asami embraces him gently with her sweaty body as if to soothe his weary mind and body. But then, unexpectedly, Jun finds himself strongly aware of his mother's body…
