A thirteen-year-old French girl deals with moving to a new city and school in Paris, while at the same time her parents are getting a divorce.
Camille Vigault, takes advantage of his vacation to visit a cousin winemaker in Roussillon. Quickly tired by work in the countryside, he prefers to buy an old abandoned Rolls Royce from his cousin.
Robert Dumortier and his son "La Puce" live on a barge moored to an island of the Seine and Robert dreams of cruising remote and exotic seas.