In addition to being dumped by his girlfriend on his 29th birthday, Sylvain finds out during his birthday dinner that his father Jean-Pierre is expecting a baby with Evelyn, his new, young girlfriend. For Sylvain's sister Marion, who's been trying unsuccessfully to get pregnant for the past 10 years, the news comes as a shock. Especially since she still hasn't forgiven their father for leaving their mother 20 years ago. Meanwhile, Evelyn, whose parents strongly disapprove of her relationship with a man their age, starts to wonder if she isn't about to make a mistake.