On a quiet Friday afternoon, Greg leaves work to meet his wife, Lori, at the playground. While their children laugh and play with friends, the adults' conversation drifts to unsettling reports of new terrorist threats. Suddenly, the sky erupts with red flashes-and then everything goes dark.
Power vanishes. Cars refuse to start. Cell phones become nothing more than dead weight in their hands. Stranded on the mountain with only chaos echoing from the town below, Greg, Lori, and their friends are thrust into a nightmare with no explanation.
They don't know what happened. They don't know who-or what-is behind it. All they know is that it feels like the end of the world has begun.