After accidentally encountering married woman Noriko on the street and feeling intense sexual arousal, Shijima tracks down her home and steals the underwear she is wearing. His desire grows stronger each day, eventually overwhelming his rationality as he invades her apartment and forcibly rapes her. With no way to turn to her husband for help, Noriko suffers in isolation, and Shijima continues to deepen her torment, becoming the source of her escalating anguish.