David Wozniak is a perpetual adolescent who discovers that, as a sperm donor, he has fathered 533 children. He is advised that more than 100 of his offspring are trying to force the fertility clinic to reveal the true identity of "Starbuck," the pseudonym he used when donating his sperm. To make matters worse, his girlfriend Valérie is pregnant with his child, but doesn't feel that he is mature enough to be a father.

A police detective catches wind of a brutal serial killer - the same serial killer who is responsible for the deaths of her parents, 30 years earlier.

During the Christmas holiday season, Félix and Céline find themselves working as volunteers for the drive-home service Opération Nez Rouge. Right from the first, Félix falls for Céline. But Céline doesn't feel the same way: she can't forget the fact that Félix once wrote a scathing review of her first piece of writing, crushing her literary ambitions in the process. Worse, Félix doesn't even remember her name. Céline decides to take her revenge. Just as things seem to be going from bad to worse for Félix, Céline realizes that he is vulnerable, tender... and madly in love with her. She is ready to surrender to love... but a chance encounter causes her to wonder whether Félix isn't playing some twisted love game.