A young wife named 'Shizuka' who desperately wants a child is shocked to receive a report from her husband's hospital examination stating he has no sperm. After much deliberation, the couple decides that she should get pregnant through sex with her father-in-law. This unconventional suggestion confuses the father-in-law, but from that day on, he starts to see his daughter-in-law as a woman. One day, the father-in-law gets excited after peeping at her in the bath and has sex with her while his son is out. However, this act is witnessed by two of his elderly friends who have been eyeing the daughter-in-law's voluptuous body. They sneak into her room at night, use an aphrodisiac, and rape her.
