It’s London, but not. Where there should be city streets, traffic jams, and impressive buildings of architectural importance, instead there are mostly trees, bushes, and the occasional massively overgrown hedge.
It’s wrong. Somehow all this vegetation has grown overnight, choking the city, turning all that was once familiar into a wilderness where unseen dangers could lurk behind every tree trunk. Worse, it seems it’s not just London but the whole planet.
It’s a mystery; forests don’t grow in a single night and yet this one has. Clara can think of only one person who might be able to fix it.