When her sister is attacked and killed by the hogs she is feeding, Shannon suspects that it's more than just an isolated "freak accident." What the young university professor uncovers is a trend in which animals and humans are becoming more aggressive, and it's tied to the mysterious cases of birds falling out of the sky. The common link? The food source.

Shannon's search for answers takes her on a wild adventure from the hills of Lake Tahoe to the valleys of the Southern California coastline-and into the crosshairs of powerful entities that will go to any lengths to stop her....