The chess player Raúl invites his estranged wife Ana and his son Nico to travel with him during Christmas to an isolated cabin in a snowy mountain expecting to reconcile with her. On the arrival, Raúl asks the landlord someone to help to chop wood for the family and the helpful carpenter Samuel comes to the house and cut the wood. When Raúl sees his wife giving attention of Samuel, he becomes jealous and his paranoid mind makes him believe that Ana is having a love affair with Samuel. On the Christmas Eve, Raúl invites Samuel to spend the night with his family. Soon Raúl discovers the truth about the Ana and Samuel and what happened during the Christmas dinner.