Grunhilda the Witch has a weakness… a tiny soft spot on her black and crusty heart that she hides; nice feelings she has when she gets a letter from former Salem Elementary student, Madison. But she can't keep up the ruse for long because her familiars are onto her… and so are her ancestors! When her familiars search her hovel and find her collection of letters from Madison, Mr. Williams comes up with a solution to Grunhilda's 'problem' - but it involves making a 'meanness' potion from a forbidden book! And when he accidentally mixes up a 'positivity' potion, things in town go from gloomy to bloomy! Can Grunhilda mix up a potion to fix the town, her familiars, and her own black and crusty heart before the positivity makes everything bright and cheerful forever?