A son, Takeshi, and his mother, Kiriko, came to a certain hot spring town to rescue their mother who was suffering from her husband's domestic violence.The proprietress and clerk of the ryokan look a little suspicious of the guests who are too old, but...However, Kiriko, who had been resting for the first time in a long time and was completely relieved in her mind and body, relaxed without worrying too much.One day, the proprietress of the inn realizes that the two are a real mother and child and that a forbidden love is growing between them.She plans to bring the two closer together in a certain strategy, but...