On Christmas Eve, we want everything to be perfect, yet things often go sideways. The holidays are a reality check for everyone, whether life is looking bright or dark. This Christmas, the residents of one Parisian apartment building are going to share an unforgettable holiday. They hardly know one another, only exchanging brief greetings when heading to work or taking out the trash. But this year, when neighbors who are jazzed-up, or depressed, or awed by the magic of Christmas find themselves thrown together, sparks will start flying.