Ryoko watches over her husband who is busy with work and devotes herself to caring for her aging father-in-law. She did not speak of her loneliness and depended on her few night activities for support, but one day her husband was taken away from her in an accident. A month later, just when Ryoko is about to sort out her feelings, a man suddenly comes to Ryoko to collect the debt left by her husband... Seeing Ryoko in trouble, her father-in-law decides to collect the debt, but from that day on, her father-in-law begins to relentlessly ask Ryoko to engage in obscene acts...