Thirteen-year-old Ryan Ghouls is so over Brainbasher, the hot new soda taking his hometown of GravesVille by storm. When Brainbasher vending machines show up at his school, however, the young grave ghoul finds himself dragged into the center of a soda-soaked conspiracy.

Ryan's troubles start when Mariska Abomination, daughter of the town's mad scientist, warns him not to drink the soda. Mariska thinks something treacherous lurks in the soft drink's formulation. Together with Ryan's best friend, a hot-headed werewolf named Kyle, Ryan and Mariska set out to uncover the truth.