Ten-year-old Nathan Abercrombie is having a really bad day. First, Shawna Lanchester, the prettiest girl in his class, doesn't invite him to her party. Then he gets picked last in gym class. Things couldn't get any worse until he gets doused with an experimental serum that turns him into a half-dead zombie

Nathan soon discovers that being half dead isn't all bad. He doesn't need any sleep, so he can stay up all night and play games online. He doesn't feel any pain, so there's no need to worry about Rodney the bully anymore. Still, Nathan would rather be human. Will he find a cure? Or...

Nathan is just getting started with his training for secret organization BUM when greasy green globs of goop start oozing from every faucet in town. Gross When BUM asks Nathan to investigate, he and his friends Abigail and Mookie follow the trail to the smelliest place they can imagine deep in the heart of the sewers of East Craven. And what they encounter there may end Nathan's career as a zombie spy before it has even begun .