Remy and Sandra can't have children because they suffer from the "Past Loves Syndrome". To heal, there is only one solution, they must sleep with all their exes once.
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.
Émile is afraid of the world. He no longer goes outside and paints everything blue. One night, his son Yoan encounters Soraya, a teenage fan of Tamil dance. She will help him find the right colour.
