Chihiro lives with her husband, brother-in-law and parents of an elite employee. Kojiro, a brother-in-law, looks into Chihiro who is sweating and struggling to sleep in a house with a broken air conditioner on a midsummer night. Kojiro, who cannot get a job and is compared with his older brother, turns his lust to his older brother Chihiro in the frustrating days. And he steals the eyes of his family and commits Chihiro. When her husband goes on a business trip, Kojiro goes out of control and drowns in intense sweaty sex.