Risa, a wife, has come to a hot spring resort in the mountains with her husband Shingo and her father-in-law Nobuo for a family trip. It seems that this hot spring is a place of memories that Nobuo had visited with his now deceased wife. Contrary to Risa's kind feelings of concern for her lonely father-in-law, Nobuo's desires were swirling in his head. Unfortunately, Shingo fell ill and took to bed, and Risa was attacked in her sleep and raped in a situation where she couldn't make a sound. Nobuo, who had gotten a taste of it, continued to do so afterwards...