With filthy hair all over his face and horrid plots growing in his mind, Mr Twit is one of the nastiest people you will ever have the misfortune to meet, and Mrs Twit is just as bad and twice as ugly! But they don't stop at tricking each other: neighbouring children and even the local birds are in danger, and that's where Muggle-Wump and his family come in. They have had enough of the Twits' tricks, and with the help of the Roly-Poly bird, they decide it's time for sweet revenge . . .