Liam Neeson reunites with UNKNOWN director Jaume Collet-Serra) for this airborne thriller about an Air Marshal racing to stop the villain who has framed him as a hijacker during a non-stop flight from New York to London. From the moment we first meet Air Marshal Bill Marks (Neeson), it's apparent his nerves are frayed. After furtively knocking back a stiff drink in the airport parking lot, he enters the crowded terminal to board a plane bound for London. Carefully observing his fellow travelers along the way, Marks eventually ends up seated next to nervous flyer Jen (Julianne Moore), who begins to breathe easier once she's seated near a window. Later, as the plane hits cruising altitude, Marks receives a mysterious text message stating that a passenger on the flight will be killed every 20 minutes unless $150 million is deposited into a secure bank account. But the harder Marks works to identify a suspect, the deeper he implicates himself in what becomes a deadly hostage crisis unfolding at 30,000 feet over the Atlantic Ocean. When it's revealed that the account for the ransom money is in Marks' name, the FAA revokes his marshal status and the media paints him as a hijacker. As the frightened passengers begin to turn on Marks, he suspects the true culprit may not even be on the plane. And with the help of Jen and perceptive airline hostess Nancy (Michelle Dockery), he attempts to clear his name and protect the passengers by any means possible.