Upon being sent to live with her aunt in the small town of Doverville, 12-year-old Emma O'Conner finds herself in the middle of a 'dog-fight' with the Mayor and town dogcatcher. In order to strike down their "no-dogs" law, Emma must bring together a group of schoolmates, grown-ups and adorable dogs of all shapes and sizes.

Something terrible is happening at Hastings Market - something inhuman. Caught up in the grisly horror inside the market are shoppers who have been turned into hostages. A dedicated commando band of raiders are on a search-and-destroy mission to stop the intruders dead cold no matter where they hide. A nerve-shredding battle for human survival against aliens that invade our world by invading our bodies.