Told in two voices, Jean, a rich girl, and Fritz, an outsider, compete for the affection of handsome newcomer Gil during the summer of 1976 at an exclusive Fire Island enclave, and discover their competition has higher stakes than either can imagine.
Wealthy teen Thea Parott's jealousy of her older, prettier, more popular sister Alex prompts a series of self-destructive acts that threaten their seemingly-idyllic lives.