A young woman arrives in Paris where she finds a job as a waitress in bar next on Avenue Montaigne that caters to the surrounding theaters and the wealthy inhabitants of the area. She will meet a pianist, a famous actress and a great art collector, and become acquainted with the "luxurious" world her grandmother has told her about since her childhood.

"Never let go" "A Very Long Engagement" tells the story of a young woman's relentless search for her fiancée, who has disappeared from the trenches of the Somme during World War One.