Have you ever looked at a tree and seen a face staring back? Maybe you spotted a knobbly brow or a knotty pair of eyes, or even a mossy beard? Well, next time you do, stop staring and say hello!

When Iggy discovers overgrown Wildtop Wood at the end of his new garden, he couldn't be more excited. A whole new world opens up for him and his brother Cal, high in the treetops, a world of tangled greenery and unexpected adventure.

But some say the wood is a place of danger and mystery. And as Iggy and Cal venture further into the trees, they hear whispers of a fading green magic, and scampering animals seem to be leading them to a secret deep at the heart of the wood. Could it be that the wood needs them just as much as they need it?