Les lendemains de veille tells the story of Vincent, Malo, Lola, Matéo, Blaise and Xavier. At the time they were young and had a dream, that of living together; free and autonomous. And this dream had a name: "The community of the days before." However, their group ended up doing like everyone else and they gradually lost sight of each other. They hadn't made a date in the future, but the death of one of their own decided otherwise.

In a world where there is only one type of music, Tom and Vilma, traumatized at birth, are the only ones who do not like this unique melody called Music. These two siblings work in the Research & Innovation department of the music industry giant. After accumulating failures in their quest for a new melody, they are unceremoniously fired by the president's new wife. The president's son, who is on bad terms with his young stepmother, gives them a glimpse of a solution to get their jobs back.