4 young people are long time friends. They have a dinner together, which will turn into a mess when they play a game which consists in writing a vow on a little piece of paper to be put into a bottle: they love each other, but they are not able to transcend their loneliness and their selfishness.

Comment un petit jeu de vœux dans une bouteille va non seulement bouleverser une soirée entre amis, mais aussi leurs destins.