With his fiftieth birthday approaching, and undergoing an existential crisis, Raphaël drags his two best friends away on a yacht trip, hoping in this way to rediscover the atmosphere of the vacations they had in their youth.

A little hitch: no one actually knows how to navigate! Blocked between the Port-Cros and Porquerolles islands, they end up taking on board three young women encountered by chance, who risk making them sink…