One day, a salaryman's husband, who is working hard in preparation for his upcoming promotion, comes home with his boss, Director Nakata. He tells her that he will be going on a business trip to a branch office outside the prefecture starting next week, and for some reason Director Nakata asks Miho, the wife of his subordinate, to accompany him on the trip. Miho is confused, but she reluctantly agrees when her husband begs her to do so, saying that it is for his promotion evaluation. The following week, at a hot spring resort in the mountains, her boss asks her to entertain him in an obscene manner...