Amelia and her friends are taking part in a competition to visit Pumpkin Paradise Park – the most bloodcurdingly brilliant theme park ever! All they have to do is sell as many cookies as possible.

But the creatures of Nocturnia have begun to act very strangely . . . No one can seem to remember anything – including their own names or even Amelia’s big birthnight party!

Where have everyone’s memories gone? And how can Amelia save them when they have all forgotten who she is?