I have been working for 40 years at the expense of time with my family. A "hot spring trip" planned by her daughter, Fuyumi's husband, Taro, to aim for Akio, who has retired on a sunny day, and Eiko, who has continued to support her husband. Akio was thrilled by the family trip that he could never go to when he was active, and with gratitude to Taro, the group came to a certain hot spring town. Eiko arrives at the inn and immediately soaks in a hot spring with Fuyumi. However, a man looked into the body of Eiko with a suspicious look. What is that man ...! ??