Daniel Garey, a young boy who is always jokingly called a girl by his classmates, and Theo Le Loire, a transfer student whose name is always associated with gasoline, the two brothers, who are always excluded, in order to find an outlet for their distress, have a whim to plan a crazy adventure. With the summer vacation coming, the two imps didn't want to spend the boring summer with their families at all. With a lawn mower engine and a few planks, they built their own powered RV with the idea of indigenous steelmaking and embarked on a road trip across a vast French town.