1809, France. Captain Neuville is called to the front, leaving his future bride heartbroken. Her sister decides to write letters on his behalf to cheer her up. But it all goes south when Neuville reappears.
After many years of keeping a careful distance, Gaspard, 25 years old, has to renew contact with his family when his father announces he is getting remarried. Accompanied by Laura, an eccentric girl, who agrees to play the role of his girlfriend for the wedding, he finally feels ready to set foot again in his parents' zoo where he is reunited with the monkeys and tigers he grew up with. But between a father who's too much of a womanizer, a brother who's too square and a sister who's far too beautiful, he's not aware that he is preparing to live the last days of his childhood.