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.
From the Atlantic to the Black Sea, Mathias and Philippe, two old friends, embark on a bicycle journey that Mathias’s son made before his tragic death. The two men ride through the ordeals with tenderness, humor and emotion.