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.

Claire is given a mission that no one wants by her advertising agency : to dust off the communication of a small parish, Notre-Dame du Saint-Esprit. Initially unmotivated, she ends up putting her heart into the work, won by the enthusiasm of the young and dynamic father Vianney. The campaign she launched on social media then works beyond her expectations : Jesus seems to respond to it, via a Twitter account.

Greg is a police lieutenant; he must collect informations on eco-activists, infiltrating them for months. Myriam, a young free woman, is fighting to save a forest from the building of a dam. They meet and fall in love on the Zone. A beautiful life, a joy that Greg discovers, despite the risks of being unmasked. For each of them, time is short: soon everything will disappear.

At 25 years old, Jean-Christophe Markovich is at the top of his career as a professional basketball player. Though courted by the most prestigious teams in Europe, Jean-Christophe surprisingly decides to join his former club which has recently been promoted to the highest level. His ultimate goal ? The French national team.

Lis, a 10-year-old boy, whose father is a missing person from the Kosovo war, lives cramped in a small apartment with his family during early 2000. Trying to forget a secret only he knows, Lis joins a French trio of clowns who are in Kosovo to entertain the children of the land. Soon enough Lis will learn that reality will catch up with everyone, and he will have to face his suppressed emotions.