Academy Award Winner “Best Documentary Feature”, Grammy Award Winner “Best Music Film”, Award-winning director Morgan Neville shines a spotlight on the untold true story of the backup singers behind some of the greatest musical legends of the 21st century. Triumphant and heartbreaking in equal measure, the film is both a tribute to the unsung voices who brought shape and style to popular music and a reflection on the conflicts, sacrifices and rewards of a career spent harmonizing with others.