Sébastien, a conscientious and professional train inspector, dreams of being transferred to the South of France. To validate his transfer, he has to make one last routine run under the supervision of Madeleine, a slightly sociopathic inspector who won't let him go. That's when everything goes wrong: between a driver who thinks he's driving a fighter jet, a jealous colleague and passengers who are each crazier than the last, what was supposed to be a formality turns into the worst trip of his life.

Summer holidays, first love and a family secret. When 14-year-old Ali travels to the country with his little brother Selim to visit his grandparents, he is anything but enthusiastic. Ali does not yet know that he will meet the handsome Réjane and that his grandfather André is hiding something from the family. This will be the Summer where Ali will be tested.

Thirty-year old adulteen Vincent babysits animals and children for a living, and his latest job is 9-year old Bart, who just moved into the building with his overworked and single mom. At his new school, Bart is anxious to develop a cool reputation, so when everyone assumes that laid back, eccentric Vincent is his dad, he begs him to play along, especially when his “dad’s” fun, immature behavior delights all the kids in his class! Initially reluctant, Vincent changes his mind after falling in love with his “son’s” attractive young teacher. And in order to spend as much time with her as possible, he does his best to make sense of the mysterious codes and expectations of his weird new tribe: the Parent-Teacher Association. But Vincent soon faces a bigger issue: How to backtrack on the huge “tiny little lie” he’s gotten himself into.

Nour, a 14-year-old boy, is enjoying the summer holidays in the South of France. He is the youngest of four brothers. They live together in a council estate, caring for their mother who is in a coma. Nour dreams of escaping to a faraway place. When he crosses paths with Sarah, an Opera singer teaching summer classes, he finds the opportunity to come out of his shell and explore new horizons.

Paris, 19th arrondissement. As Zack is hosting his friends at home, his little brother, Elie, makes an unexpected appearance.