On a flight from New York to Paris, ladies' man Antoine (Nicolas Bedos of Populaire) finds himself seated next to artist Julie (Ludivine Sagnier of Swimming Pool and The Devil's Double)—the hotheaded ex with whom he had a nasty breakup three years ago. Face to face, the pair relive the highs and lows of their tumultuous relationship. She's now engaged and he's still afraid of commitment, but their chemistry is undeniable. Miles high, will they rekindle their passion?