Upset that his fiancee wants to take a break in their relationship, and to reduce his stress levels, Jean-Pierre Savelli, an insurance company employee in Clermont-Ferrand, decides to spend his holiday in an unusual place for him - the Blue Waves campsite, near Arcachon.

There he meets eager campers including Patrick Chirac, and begins to act as a single man again.

Patrick begins to cause discord in the camp, although the other campers (Jacky, Paulo, Laurette and Sophie) are already ill-humored, all the more so when it is revealed that the "Blue Waves" campsite may be sold to a Spanish group, to be replaced by a luxury hotel.

To this end, the campers invent a ploy to undo the work: they decide to try to convince the DRAC inspector that Gallo-Roman pottery is buried in the ground, and that the site is of archaeological importance.

The deception ends up being uncovered, the inspector visits the correct campsite, examines the excavated pottery and authenticates it as genuine.