Ce matin, Steph, trentenaire adolescent, décide d'annoncer une grande nouvelle à son compagnon, Flippy, l'ours vedette des céréales Flip's. Mais que pensera ce dernier du projet qu'a Steph de suivre les cours d'une école de ninjas au Japon ? Ou plutôt, jusqu'où le prendra-t-il mal ? Y'a-t-il une échappatoire ? Et au fond, est-il bien opportun de vouloir à tout prix réaliser ses rêves d'enfant ?

10-year-old Ellie is fascinated by nature and birds, she spends her time reading about them. One day, a few miles from school, she goes onto a little island on the Loire River to take a bird book back to the library. It's an island full of birds.

Five years after their summer together in Barcelona, Xavier, William, Wendy, Martine and Isabelle reunite.

Agathe, 39, has but one obsession: to have a child.
She finds her ex, Marc-Antoine, a DJ, mixing techno in Marseille.
As she tries to talk to him into getting back together, plastic bags come to life and attack the city.