In 1912 German collector Wilhelm Uhde rents a flat in Senlis to write and take a break from Parisian life. He hires a 48-year old cleaning lady, Séraphine. Some time later, he notices a small painting on wood at a local notable home.

Violette Leduc, born a bastard at the beginning of last century, meets Simone de Beauvoir in the years after the war in St-Germain-des-Prés. Then begins an intense relationship between the two women that will last throughout their...