The Impoliteness Bug tells the story of five-year-old Kassie, a perfectly sweet little girl who suddenly begins saying things that aren't so sweet. With some help from mom and dad and brother, Luther, Kassie discovers that she has been bitten by the rudest, most disagreeable creature around: the Impoliteness Bug! The quest is on to return Kassie to her naturally happy, sassy self. But such a big task will require the very best medicine in the whole wide world: the love of her family.