Françoise has just been dumped by her husband for a much younger woman. In order to cheer her up, and to celebrate her 60th birthday, sisters Rose and Alice decide to take their mother to a resort on the tropical island of Reunion so they can relax, work on their tans, and have too many margaritas. But when Rose pays a one-night stand, Thierry, to show her mother a good time, their holiday plans start to unravel.

Max, a 23-year-young man, works in his father's fish shop. In this family business, the days are long and repeat themselves. The arrival of Zoe, an enthusiastic and full of life trainee, disturbs the routine of Max and leads him to rethink his future with seemed to him to be a foregone conclusion.