"In this edge-of-your-seat horror novel, a four-hour flight takes a nightmarish turn when a supernatural creature gives a group of high school students a sinister ultimatum. Devon Marsh is haunted by secrets. But she's determined to start fresh when she boards a four-hour flight along with her classmates for their senior class ski trip. Devon never could have guessed those secrets would surface in the most terrifying way when a supernatural creature hijacks their flight and gives the students a deadly ultimatum: Choose one among them to sacrifice before the end of the flight. Or the plane will crash."