Lily James and Asher Parker have always been a package deal-neighbors, best friends, the kind of us that feels permanent when you're fifteen. Somewhere between shared secrets and quiet moments, everything starts to shift. Feelings grow deeper, glances linger longer, and suddenly the line between friendship and something more isn't so easy to ignore. But loving your best friend is terrifying-and neither of them knows how to say the words out loud. Then Asher's family announces they're moving away from Rosemount, turning their world upside down. With time slipping through their fingers, Lily and Asher are left holding onto memories, stolen moments, and the hope that maybe first love can survive change.