Zahia Ziouani, 17, dreams of becoming a conductor, while her twin sister Fettouma hopes to be a professional cellist. They want to make classical music accessible to everyone and create their own orchestra.
Benjamin and Aude have loved each other for 7 years. They live together on a small island in Brittany. Benjamin dreams of starting a family but the couple learns that Aude is sterile. So Benjamin has an idea. He is the one who will bear their child because before being Benjamin, his name was Sarah.
