Plot summary

With his life slowly falling apart, the Federal Air Marshal, Bill Marks, takes a non-stop transatlantic flight from New York City to London. But, shortly after take-off, Marks starts receiving a series of anonymous text messages from an unseen adversary who is threatening him that, unless $150 million is deposited in a special off-shore account, one passenger on the plane will die every twenty minutes. Now, not knowing who to trust, Bill finds himself in the middle of a dangerous cat-and-mouse game, and the clock is ticking. Who's behind this deadly conspiracy? Can Marks have the death of an innocent on his conscience?—Nick Riganas