If you couldn't tell already, aeroplane thrillers pretty much all follow a similar format, usually involving a hijacking of some kind, but "Flightplan" is the only plane film to take place on an Elgin E-474, a novelty double-decker — though nothing is novelty about the experience these passengers are in for. Making the long flight from Germany to New York to bury her husband is aeroplane engineer Kyle Pratt, along with her young daughter. Upon waking from a peaceful nap, Kyle realises the seat next to her, her daughter's seat, is empty. In a panic, she begins searching the double-decker plane, though the captain and the air marshal say Kyle's daughter never boarded the plan.