There's a witch running loose in the town of Excelsior, Minnesota, and her brew is … beer. Actually, Leona Cunningham, co-owner of the Barleywine, is a practitioner of Wicca, the nature-based religion that many mistakenly believe to be sorcery or black magic. But that doesn't bother the thirsty crowds—or the Halloween Committee members who have fallen under the spell of Leona's tasty ales.

Then, after one too many pints, local alcohol aficionado Ryan McMurphy accuses Leona of being a real witch, blaming her for the series of accidents that have happened throughout town. When Ryan ends up dead, without a mark on his body, Leona is not only the target of a witch hunt but also the prime suspect. But with Betsy on the case, the murderer doesn't have a ghost of a chance of getting away with it.