Petit Potam lives in the village of Barbotam on an island in the Potamazone river. The village's activities revolve around the river and Pa Potam plays a very important role there: driver of the boat-train, he distributes provisions, mail.

Willy Vander Brook, a world with Franco-Belgian roots, travels to Paris for an interview. He is welcomed by his childhood friend Serge, an ex pub operator, and his roommate Frank, a fierce supporter of the Walloon independence. When Willy discovers that his candidacy is not accepted because he is Belgian, he and his compatriots decide to take revenge

In a desert world where oxygen is running out, man is forced to live underground. Lana, resourceful young woman, takes care of her young brother Théo. But one day, he disobeys her.

Hubert Durieux is a mild-mannered provincial banker whose orderly life—with an ex-wife, an adoring daughter, and a mistress—gets hilariously upended when he becomes entranced by a free-spirited Roma woman who steals his car and hides in its trunk.

Six characters cross paths in Paris and Lisbon.