Grunhilda the Witch has a weakness, a tiny soft spot on her black and crusty heart. She continues to hide the 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! The familiars search her hovel and find her collection of letters from Madison. Mr. Williams has a solution, but it involves making a meanness potion from the book that Is-Not-To-Be-Used-By-Anyone-Other-Than Witches! But anything that can go wrong does when he accidentally mixes up a positivity potion instead and it starts to affect everyone in town!