Rodolphe Marconi's poignant drama centers on 19-year-old Simon (Gaspard Ulliel), who's heading home to spend Christmas with his dysfunctional family. On the train, Simon meets the beguiling Louise (Melanie Laurent) and brings her along for the visit, but his family misinterprets their relationship. Conflict erupts when Louise sets her sights on Simon's best friend. Nicole Garcia, Bruno Todeschini, Christophe Malavoy and Alysson Paradis co-star.