An air marshal springs into action during a transatlantic flight after receiving a series of text messages demanding $150 million into an off-shore account, or someone will die every 20 minutes.

Bill Marks is a burned-out veteran of the Air Marshals service. He views the assignment not as a life-saving duty, but as a desk job in the sky. However, today's flight will be no routine trip.

Shortly into the transatlantic journey from New York to London, he receives a series of mysterious text messages ordering him to have the government transfer $150 million into a secret account or a passenger will die every 20 minutes.