Los Angeles, Christmas Day. Airport security officer Ethan Kopek already anticipates how he will handle this demanding shift, and in the evening, together with his pregnant girlfriend who also works here, he will begin to celebrate Christmas. Deciding to get a promotion, he asks his supervisor to give him a tougher assignment and to put him on introskop duty. Soon an unknown man contacts Ethan, insisting on letting luggage with prohibited contents pass through the introskop, otherwise his girlfriend will die.