When her father-in-law Kozo was diagnosed with alcoholism, his wife Yuko moved in with her husband Koichi to look after him. The next morning, after Koichi had gone to work, Kozo started drinking again. "No! Don't drink!" Yuko snatched the drink away from him, and they got into a scuffle, leading to Kozo raping her. No matter how much he forced her, the horrible fact that she had had a physical relationship with her father-in-law torments Yuko...