"I go wherever magic is needed," said Ms Wiz. "Wherever things need livening up..." Things are certainly livened up at St Barnabas School when Class Three's new teacher arrives. She has a magic rat, a rather rude owl and some very special powers. But when Podge's dad is turned into a warthog and the School Inspector loses his trousers, Class Three has to admit - Ms Wiz spells trouble!