A gifted 11-year-old boy secretly builds an air balloon with his friend Emma, to prove to his father that everything in life is possible.

At the age of 10 years, young Rémi is snatched from his adoptive mother and entrusted to the signor Vitalis, a mysterious itinerant musician. Has its hard sides - he will learn the harsh life of acrobat and sing to win his bread. Accompanied by the faithful dog capi and of the small monkey Joli-Coeur, his long trip through France, made for meetings, friendships and mutual assistance, leads him to the secret of its origins.

A new boss for dad; a new schoolmate for Boule. New problems in sight.