Inigo Jones is enjoying the summer holidays without a care in the world when a mysterious message arrives from the bowels of the Earth. His friend Omily Topatus is in trouble and needs urgent help. But when that friend is a goblin who lives in a hidden subterranean world, going to their aid is no simple matter. So Inigo enlists the help of his best mate Lachie Henderson and girlfriend Cissy McVitie to make the descent through a secret portal into unknown territory. But they may all be walking into a trap laid by the evil goblin Prime Councillor Spadnog Trouserbiscuit. With the help of an ancient elven spell book and a talking magpie called Cuthbert, our unlikely band of heroes must uncover and foil a terrible plan to enslave all of mankind. But will they succeed against the mighty Cakes of Wrath?