Oscar is not a liar. His imagination just runs a little wild. Oscar is not an orphan. His parents have gone far away on a secret mission. Oscar is not on the run. He does not like the orphanage and prefers to regularly give his teacher, Ms Elise, the slip. Oscar is not alone. Khartoum, the homeless man, and Roquet, his dog, are always there to watch over him. Together in the street, they transform every day into a great adventure.