One day, a salaryman's husband, who is working hard in preparation for a promotion, comes home with his boss, Director Abe. 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 Abe asks Kaho, the wife of his subordinate, to accompany him on the trip. Miho is confused, but when her husband begs her to do so, saying that it is for his promotion evaluation, she reluctantly agrees. The following week, at a hot spring resort in the mountains, her boss asks her to entertain him obscenely...