At summer camp, a combative collection of Boy Scouts becomes the first to face a shocking event out of a horror film: a bizarre storm mysteriously appears over the forest one night and spins above their camp. This otherworldly tempest moves in a way that no normal storm should: willfully.

Predatory monsters that can only be seen in reflections rain down to earth wherever the storm goes. They bite and paralyze their victims before feeding on them and prey on everything that moves. The storm soon races its way to suburbia and into the city, leaving chaos and few survivors in its wake.

One of the Scouts is brought together by the mayhem with other young survivors from different parts of town, and these kids, who would never have met otherwise, become fast friends as they come to believe they can survive-or even stop-the storm. But first they must outwit adults who would rather hurt them than follow them. Invisible monsters are not the only things that kill.