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... Through the pasts of the five main characters, a description of the French youth in the middle of the seventies.