On a flight from New York to Paris, where she is due to get married, beautiful Julia (played by Ludivine Sagnier) finds herself sitting next to Antoine (Nicolas Bedos), a charming hedonist she fell in love with three years ago. While Julia tries to avoid contact for seven hours and Antoine plots ways of winning her back, we travel in time to revisit the stages of their love affair from first encounter to breakup - so many extravagantly romantic and deliciously caustic scenes that make this the most compelling journey of their lives.