chunk: Kyle Pratt (Jodie Foster), an American aircraft engineer employed in Berlin, Germany, is widowed with a six-year-old daughter Julia after her husband David falls off the roof of their building to his death. Kyle decides to bury him in their hometown back in the U.S., on Long Island, New York. They fly aboard a passenger aircraft, the engines of which Kyle helped design. After falling asleep, Kyle wakes to find that Julia is missing. She begins to panic, and Captain Marcus Rich (Sean Bean) is forced to conduct a search. None of the passengers remembers seeing her daughter; Julia has no register in either the Berlin airport or the passenger manifest; and Kyle cannot find Julia's boarding pass. Marcus and the other crew members suspect that Kyle has become unhinged by her husband's death and has imagined bringing her daughter aboard. One flight attendant, Stephanie (Kate Beahan), is particularly unsympathetic. Faced with the crew's growing skepticism regarding her daughter's existence,