In Zero Hour, when mysterious ovals appear in the sky, the world changes forever. In the minutes that follow, a wife fights to keep her ailing husband alive, a doomsday prepper races to get his family to safety, teenage runaways are caught in the middle of a bank robbery, and a brilliant young presidential aide scrambles to make sense of it all. What begins as a pulse-pounding survival story slowly unravels into a sweeping mystery, as the truth about who these visitors are, and why they have come, upends everything humanity thought it knew about first contact.