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

Ten years after their Upper Sixth, Bruno, Momo, Leon and Alain meet together in the waiting room of a maternity hospital. The father of the awaited baby is Tomasi, their best friend at that time, who died one month before due to an overdose. They remember their teenage, their laughs, their dreams, their stupid pranks... a description of the French youth in the middle of the seventies.

A strait-laced French student moves into an apartment in Barcelona with a cast of six other characters from all over Europe. Together, they speak the international language of love and friendship.

Xavier is a 40-year-old father of two who still finds life very complicated. When the mother of his children moves to New York, he can't bear them growing up far away from him and so he decides to move there as well.

Rémy and Mélanie live next door to each other in Paris but have never met. The two thirty-year-old Parisians search for connections online, but never have much success. Falling deeper into loneliness and depression, both decide to start attending regular therapy. With the help of their therapists, they uncover the real roots of their issues, and find that the connection they were both searching for is much closer than they thought.