In 1999, teenage sisters Celeste and Eleanor survive a seismic, violent tragedy. The sisters compose and perform a song about their experience, making something lovely and cathartic out of a catastrophe - while also catapulting Celeste to stardom. By 2017, Celeste is a mother to a teenage daughter of her own and is struggling to navigate a career fraught with scandals when another act of terrifying violence demands her attention.

Mia, an aspiring actress, serves lattes to movie stars in between auditions and Sebastian, a jazz musician, scrapes by playing cocktail party gigs in dingy bars, but as success mounts they are faced with decisions that begin to fray the fragile fabric of their love affair, and the dreams they worked so hard to maintain in each other threaten to rip them apart.