Mr Gum has found himself a brand new treat - rancid kebabs dripping with dirty grey sauce. And he can't get enough of them. But not everyone's happy about Mr Gum's new dinnertime arrangements and soon the town of Lamonic Bibber is gearing up for war. Can Polly and her friends save the town from being torn apart? Will Mr Gum's hunger ever be satisfied? And who on earth is Thora Gruntwinkle?