There's also a love interest, of course, who is really watching Nick to make sure he doesn't become the embodiment of evil, but may have feelings for him, too.
The plot is a little odd, and some of the writing is hokey or laughable (in an unintended way), but it's rather entertaining, too. (How do they become zombies? a video game, if you can believe it. How to change them back? A cattle prod!)
Full Disclosure: I received a free ARC of this book at a conference, courtesy of the publisher.