This biographical film centers on how Barbe-Nicole Ponsardin became known as the Grand Dame of Champagne and pioneered advancements in the champagne industry at a time when women were barred from owning businesses in nineteenth-century France. Starting from her marriage to the winemaking scion François Clicquot, the story follows her struggles after she was widowed at an early age. She struggled to keep the wine business alive, protecting the name and legacy of her husband as she made her own.