Raphaël is 50-something and in a rut. Without telling his wife, he buys a sailboat and convinces his childhood friend Patrick, an eternal teenager, and Alain, a hypochondriac, to go on a tour of the Mediterranean Sea with him. Holidays just like in the old days! The three friends however soon notice that they are not as fit as they used to be and don't really share the same interests anymore. All that changes when they take two much younger women on board who join them on their tour...

En pleine crise de la cinquantaine, Raphaël entraîne ses deux meilleurs amis sur un voilier, espérant renouer ainsi avec l'ambiance de leurs vacances de jeunesse. Petit problème : personne à bord ne sait vraiment naviguer ! Bloqués entre les îles de Port-Cros et Porquerolles, ils finissent par embarquer trois jeunes femmes rencontrées par hasard qui risquent de les faire chavirer…