It's the first day at a new school for both Sam and Sara.

So of course they're hoping to fit in quickly. All they want is a helping hand. Some new friends to keep an eye out for them and help them get ahead.

What they're probably not hoping for is a thumb. Actually, a lot of thumbs. And fingers. They're turning up all over Freekham High - in seriously unexpected places.

But why? Can Sam solve the mystery of the bothersome body parts?

Can Sara keep her cool in the face of the dastardly digits? And most important, can they get through the day without being labelled as losers by their new classmates?