Science teacher Jo Gartner thinks teaching geology to hormonal pre-teens is deadly…until she is bitten by an inept vampire and becomes Underdead—all the problems of being a vampire, none of the perks.

When she finds a body on her classroom floor with teeth marks in his neck, she must figure out whodunnit before her Underdead secret gets out. But she's running out of time. The detective in charge of the case is dogging her every move, her vampire traits are evolving in new and embarrassing ways, and someone wants Jo dead…the traditional way!