"Machine Gun" is 12 years old. He lives in the Cité Rose, his city that he would not leave for anything in the world. His universe is his family: Isma, his 16-year-old cousin, who admires Narcisse, the neighborhood kingpin, and takes a wrong turn. His big brother, Djibril, 22, a student at La Sorbonne and who dreams of becoming a lawyer. Mitraillette, he would just like to go out with Océane, the most beautiful girl in college... Their destinies are linked, within a neighborhood, at the heart of its towers where dreams, sometimes, are paid for in cash.