After years spent in Paris, Clotaire Sangala returns to his native country, Africa. Raised by a Chinese martial arts grandfather, convinced to have been found in a garbage can, Clotaire knows nothing of the glorious past of his parents. He will become "Black Snake", the masked and ultra-sapped superhero, liberator of the people against the dictator Hezekiah.

Gabrielle is a "statue" for tourists, much to the chagrin of her teenage son. Elsa is in angry at the world and desperate to become pregnant. Mao is a chronically depressed video game designer who drowns his melancholy in alcohol and psychoanalysis. They are brother and sisters but do not hang out. Ever. Their parents Pierre and Claudine, separated for a long time, have really done nothing to strengthen the bonds of the family - yet, at their grandfather's funeral, they are going to have to meet, and together answer the question: "What to do with grandma?"

In the vibrant African neighborhood of Château d'Eau in Paris, Charles is the smoothest of all the hustlers. His job: to fill the districts numerous hair salons with customers. But when the competition is tough and everybody’s trying hard to be number one, dirty tricks are just around the corner.