During a record-breaking heatwave, Yuki's air conditioner suddenly breaks down. Frantically seeking repairs, her husband finds every service booked solid. Remembering that his uncle used to work as an electrician, he urgently invites him over. The next day, Uncle Jinbei arrives. Having had little contact with women for years, he immediately takes a strong interest in Yuki. What begins as a simple repair job quickly spirals into an unexpected and intense encounter.