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.

Doctor Petypon, a respectable doctor, partied until early morning at Maxim's. His best friend discovers him asleep at noon under an overturned sofa. From the bedroom comes the Môme Crevette, a dancer from the Moulin Rouge. She is forced to pretend to be his wife. It stings at the game and causes a cascade of misunderstandings, imbroglios and drama at a frantic pace.