Beatrise is drifting in life. She has based her existence on unsuccessful relationships that have collapsed, like sand castles, one after the other. Forced to re-evaluate things, she realizes that she can only achieve harmony by learning to rely on herself, and not on illusory feelings or words.
Members of a class of the 1980s hold an annual gathering. All together spend one night remembering the passions and hopes of youth and realising what has been achieved or missed.
