Thanks to the Christmas holiday, the Milgram families gather together to spend together a few days after years that they have not seen before. Soon they get caught in their house at the suburbs of the city when a mysterious substance surrounds their house and then realizes that all the windows and doors are locked out, unable to get out. Trying to understand what is happening to them, believing they are the victims of either an industrial accident or a terrorist attack with chemicals, they go on TV to find out some news about the situation. Only by turning on her TV I see only a repetitive message that urges them not to leave the house and wait for further instructions. Terrified, they follow these instructions, but with the passage of time, paranoia is beginning to disturb them even more.