The novel opens with the protagonist of the novel, Shimamura, riding a train to a remote onsen town. Shimamura is a rich, married man, who inherited his wealth, and a self-professed ballet expert. During the train ride, he observes a young woman (who is later revealed as Yoko) caring for a sickly man (named Yukio). He observes the woman through a reflection in the train window, and is particularly enthralled by her eyes, as well as the sound of her voice.