Yoko Nakajima is a widow who, while mourning her late husband, indulges in masturbation cherishing memories of their time together. She has a daughter and a young grandson, but her husband passed away 45 years ago when they were still young. She gets the chance to go on a hot spring trip with her daughter and grandson—an inn that holds special memories, as it was the very place she and her husband visited together for the first time. At this nostalgic destination, Yoko's past memories intertwine with her present emotions, unfolding a deeply personal journey.