In this charming musical comedy-drama, Keira Knightley stars as Gretta James, a talented young songwriter from England who finds her life's purpose after being ditched by her cheating boyfriend. Mark Ruffalo plays Dan Mulligan, a record label executive struggling to stay relevant in the ever-changing music industry, who discovers Gretta's raw talent and proposes an unconventional collaboration: recording an album of songs performed live at various public locations around New York City. As they work together, Gretta and Dan form a bond that inspires her to confront her past and find closure, leading to a heartwarming conclusion that will leave audiences humming the music long after the credits roll.