The story of Léo Lauzon (Maxime Collin), a young boy living in a Montreal tenement with his dysfunctional family. He uses his active fantasy life and the book L'avalée des avalés by Canadian novelist Réjean Ducharme to escape the reality of his life. After deciding that his mother (Ginette Reno) was impregnated not by his father, but by an Italian tomato, he rechristens himself Léolo, and begins to have sexual fantasies about his neighbour Bianca (Giuditta del Vecchio).
