In the futur, a spaceship destroy space junck around earth. But who is the pilot?

Tony, her sister Cindy, and their gipsy family, live and sing at « la Butte Pinson », a place of freedom, in the North of Paris. But today their world is threatened by a big project of town and country planning. Condemned to live between the walls of an "open-air prison ", Tony and Cindy resist bulldozers by their songs.