Charming attractive Alex (Romain Duris), his sister Mélanie (Julie Ferrier), and her husband Marc (François Damiens), operate a unique business for concerned third-party clients—breaking up relationships, but only where the woman is "not knowingly unhappy."

So, at first, Alex turns down the job, but, massively in debt to a loan shark through his own lavish spending on the business, he is pressured into putting aside his honourable principles to complete the seemingly impossible task with only five days until the wedding.

The next day, as the group leave the hotel, Marc inadvertently drops Juliette's case file in front of her.

At the airport Mélanie, after carefully observing the 'goings on' the last several days, chides Alex for walking away from real love to return to an empty life of fake seduction.

The two meet and kiss after Alex confesses that he hates Roquefort and George Michael and had never seen Dirty Dancing, is broke and sleeps in his office, but he needs to see her every day.

The site's consensus reads, "While definitely on the fluffier side of French comedy, Heartbreaker benefits from never taking itself too seriously -- and from the performance of the ever-charming Romain Duris.".