Bending over a large blank sheet of paper somewhere between Montmartre and Saint-Germain-des-Prés, Jean-Jacques Sempé and René Goscinny give life to a laughing, mischievous little boy, Little Nicolas. Between camaraderie, arguments, fights, games, mischief, and punishment in spades, Nicolas lives a childhood made up of joy and learning. As the story unfolds, the boy slips into the workshop of his creators, and challenges them with humour. Sempé and Goscinny tell him about their meeting, their friendship, but also about their careers, their secrets and their childhood.