Nadia is celebrating her birthday and Titeuf isn't invited. How could she have forgotten him, the ultimate charmer? But an even greater upheaval will shake up Titeuf's life and tip it into chaos. Adults, once again, really are useless. They do everything they can to complicate life. Titeuf is tossed back and forth between his granny in the countryside, sessions with his psychiatrist, and the conferences in the schoolyard. Titeuf, the same as ever, will try to understand what is happening to him and will multiply disastrous stratagems to fix up his life - while never losing sight of his objective: to be invited to Nadia's birthday.