Three years into her marriage, Mako Oda lives happily with her honest, kind, and beloved husband. One day, her brother-in-law, Shinji, comes to visit the Oda household. Suddenly, he demands, "Sister-in-law, lend me some money." When Mako refuses, saying she needs to consult her husband first, Shinji flies into a rage, forcefully pins her down, and rapes her. The next day, Shinji returns and repeats the same violent act. Unable to turn to her husband for help, Mako finds herself trapped in an inescapable situation.