Brilliant, award-winning reclusive composer Apollo has spent years turning down every persistent socialite and A-list industry star that flings themselves at him, all desperate to claim they are the secret muse behind his chart-topping, soul-stirring discography. No one knows he has spent 12 years obsessively chasing a half-remembered, haunting melody he caught only snippets of once, back when he was a lost, hurt teen, fully convinced no living person could ever pry that one perfect, evasive missing note loose from his head. Then quiet part-time florist Lila trips right over his tall stack of hand-drafted sheet music outside his studio, and the second she mumbles that long-lost, stubbornly unplaceable bar he could never nail down, every scattered, half-formed sound bouncing around his brain clicks into perfect, whole harmony.