Five years after their summer together in Barcelona, Xavier, William, Wendy, Martine and Isabelle reunite.
Romane and Philippe separate. After 10 years together, two children and a dog, they do not love each other anymore. They give birth to a "separation": two separate apartments, communicating only through the room of their children.
In order to save the man she loves from jail, Mathilde takes his place by helping his break-out. While she exclusively relies on him to survive in this prison setting, Mathilde has not heard from him since her imprisonment. Isolated, with her son as her only support, she is now identified by the inmate number 383205-B. Will Mathilde become a convict like any other one?
