During the annual party in the château of a wealthy French family, a murder is committed. The small neighboring town is thrown into disorder, suddenly plunged back into the old relationship of master and serfs.

After his release from prison, it was agreed that Julien would have custody of his children, Alice and Théo, on Christmas Eve. However, his joy is short-lived when his boss calls, demanding he works his shift as a deliveryman that night or risk losing his job. Faced with this ultimatum, Julien promises his children he'll be back before midnight. Julien's troubles begin the moment he sets out on his deliveries when he has a run-in with, an old acquaintance from his criminal past who blackmails Julien into driving him around a series of break-ins.