The zombie apocalypse just got real.

Zombies rule. Almost everybody in the world has turned into one, thanks to a nifty little disease called Necropoxy. Sixteen year old twins, Tripp and Trina Light, however, are among the rare humans who are not only immune to Necropoxy—they're super immune. Even a bite from a zombie won't infect them.

Great, right? Yeah, but...researchers are capturing every immune human they can find—and experimenting on them like lab rats. Just yesterday, the twins and their friends narrowly escaped.

The researchers will do anything to get them back.

That means Tripp, Trina, and their small band of survivors are on the run from zombies, mad scientists, and who knows what else. What's worse, some people in their group are starting to act funny, which isn't funny at all.

This is so not how they planned to spend the beginning of their junior year of high school in Massachusetts.

Everyone is dead.

Everyone is wicked dead.