Yasuko, a single mother raising her only daughter Aya with financial difficulties. Seeing that she is not able to support her daughter with her salary, she decided to make a living in the sex industry. One day, Yasuko comes home and finds out that Aya has been kidnapped. But Yasuko doesn’t choose to get Aya back. From that day on, Yasuko’s secret routine begins and a man begins to secretly follow her.