A few years after marrying her husband Toru, Yuko, who still cannot get close to her son-in-law Manabu, decides to take advantage of this summer vacation to return to her hometown. However, for Yuko, who is used to city life, living in a single wooden house without air conditioning is an unimaginably scorching situation. Sweat drips down her neck, beads of perspiration form on her chest, and armpit sweat stains her whole body, driving Manabu insane, and he begins to think of Yuko not as a mother but as a woman.
