Ghostly goings-on disrupt Trixie's Save the World With a Song concert, resulting in typically hilarious chaos for everybody's bestest friend. If there is one Very Extremely true fact about Trixie, it is this -- her life is NEVER straightforward. And this time the list of crazy things all happening at once is nearly a mile long! / Just who or what is the Ghost of St Aubergine's Primary School and what does it want? / Why does the Save the Car Factory meeting have to be on the same day as Trixie's Save the World with a Song Concert? / Where on earth has her trumpet gone and how is she going to tell her parents she's lost it? / And why is that dirty old man following her everywhere? Trix and friends are determined to get to the bottom of it all, no matter what!