Maki Hojo is spending her days alone at home while her children are away at a summer camp and her husband is on a business trip. She usually passes the time quietly, cleaning the house by herself. One day, the doorbell rings, and when she opens the door, an insurance salesman is standing there. She listens to his pitch politely but firmly turns him down, making him reluctantly leave. However, the salesman is yelled at by his boss and ordered to visit her again. With no choice, he returns to her home once more. When he turns the doorknob, the door opens slightly. Peering inside, he sees Maki deeply engrossed in masturbation. Overcome by his pent-up stress and desire, the salesman lunges at her and takes her mercilessly, indulging his lust without restraint.