Reiko is a single mother who works hard at her cleaning job to support her family. But she is trapped by the desires of men who degrade her. While cleaning the toilet, Reiko accidentally gives a blowjob to a man. The manager witnesses this and blames Reiko for losing top-secret documents, exploiting her weakness as a woman. In front of many employees, he plays with her voluptuous body, violently attacks her with toys, and rapes her over and over again.