A collection of long lost love letters from 1928 to 1930, recently discovered in a dusty cellar in Paris. Mademoiselle S., identified here only as Simone, was a well-educated and cultured lady living in Paris at the height of the glamorous roaring twenties. Simone's letters to her married lover Charles express her desires, fears, anxieties and fantasies, and through them we become intimately acquainted with an extraordinary woman whose sexual appetite knew no bounds, and with an obsessive and destructive love that was taken to extremes. Driven to increasing lengths to gain satisfaction, Simone may be seen as a woman ahead of her time, whose unconventional attitude challenges our preconceptions of female sexuality during this era, and was ultimately her downfall. The Passion of Mademoiselle S. paints a vivid portrait of a violently passionate love affair that evolves in shocking and unexpected ways. Framed by illuminating insights from their editor, Jean-Yves Berthault, this correspondence opens a window into another time and another life, and a woman whose voice echoes down the century and still resonates today.