In the summer of 1983, a 17-year-old Elio spends his days in his family's villa in Italy. One day Oliver, a graduate student, arrives to assist Elio's father, a professor of Greco-Roman culture. Soon, Elio and Oliver discover a summer that will alter their lives forever.

After failing her university entrance exam, Sakuko is invited by her aunt Mikie to spend summer vacation in a beautiful seaside town. Sakuko gets to know the people of the town, including Takashi, a shy relative of her childhood friend.