At the beginning of the 20th century, Fleur, a passionate and observant girl, survives with her family in The Zone, a nebulous cluster of slums on the outskirts of Paris. Forced to work in a soap factory, she endures the harshness of working-class conditions. She awkwardly shouts her revolt and finds herself on the street. When she lands in the lap of a wealthy cabaret owner who understands her talent as a lyricist, she gets a taste of the Paris of the Belle Époque. But faced with the repression that falls on the Zone and her family, she has to choose: become a singing star or stand up for her family.