The questions of the girls of today find answers in the words of the girls of the past century. Lievito madre intertwines three generations, mixing the story of the film’s authors with those of the protagonists. From interviews with the main characters of our times, famous or unknown, from our home family movies – us, our mothers and grand mothers – to the interviews with the youngest generation, a story emerges, our story, told with one voice made up of many voices: the mother yeast that created us.