Everyone deserves a great love story, but for 17-year-old Simon Spier, it's a little more complicated. He hasn't told his family or friends that he's gay, and he doesn't know the identity of the anonymous classmate that he's fallen for online.

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.