The narrator, a teacher, is in love with the beguiling, odd Sumire. As his best friend, she is not adverse to phoning at three or four in the morning to ask a pointless question or share a strange thought. Sumire, though, is in love with a beautiful, older woman, Miu, who does not, can not, return her affections. Longing for Sumire, K (that is all we are told by way of a name) finds some comfort in a purely sexual relationship with the mother of one of his pupils. But the consolation is slight. K is unhappy. Miu and Sumire, now working together, take a business trip to a Greek Island. Something happens, he is not told what, and so K travels to Greece to see what help he can offer.