Dinah Washington was perhaps the best American blues singer of the 1940s, jazz singer of the 50s and pop singer of the early 60s, and has been called the female Ray Charles. Raised on gospel and blues in black Chicago, she had just crossed over into the white mainstream with songs like What a Difference a Day Makes and Mad About the Boy when she died at just 39. It was a life of excess - too many pills, parties, mink coats and husbands. In this film, her life and music are assessed by people who knew her well and singers who love her, such as Amy Winehouse.