Paris, nowadays. Justine is 27, works at an x-ray lab and has a real problem with commitment. She leaves behind a trail of ex-boyfriends. In fact, she just dumped the latest one, Atom, and is now crashing on her sister's couch. She's just met Sami, who could be The One. But this delicate balance is thrown when her immature, 60-years-old father announces that he and wife number 3 are expecting a baby. Rather than give Sami a chance, Justine focuses on the x-ray creations she secretly produces at her lab.