From the mean streets of the Belleville district of Paris to the dazzling limelight of New York's most famous concert halls, Edith Piaf's life was a constant battle to sing and survive, to live and love. Raised in her grandmother's brothel, Piaf was discovered in 1935 by nightclub owner Louis Leplee, who persuaded her to sing despite her extreme nervousness. Piaf became one of France's immortal icons, her voice one of the indelible signatures of the 20th century.

Paris in the 1920s. Marguerite Dumont is a wealthy woman with a passion for music and the opera. For years, she has performed regularly for a circle of guests. But Marguerite sings tragically out of tune and no one has ever told her. Her husband and her close friends have always encouraged her in her illusions. Things become very complicated the day she gets it into her head to perform in front of a genuine public, at the Opera.

Jérôme has killed Driss, of Moroccan ancestry, who used to be his best friend. Is it an accident, a drama caused by jealousy or a racist murder? The story of Jérôme's long drift is discovered as the police carry out its investigation.