Budding scientist Artie has just moved into a new house with his mum, her new partner David, and his daughter Willow. Willow is a year older than Artie and he finds her utterly terrifying. In a quest to find somewhere quiet to read Artie comes across a strange book in the attic called The Bigge Boke of Fetching Monsters. Of course, Willow finds him and of course she wants to make a monster – even though they definitely don’t exist! Or do they? Will Willow’s experiment be successful?