This story is about a girl named Ana. But it's not only about her. It depends on how you look at it. The same can be said about this story being fiction or non fiction. If you are the very littoral type, then this story will make no sense as you try to make sense of the physics of this world. But if you make it your business to understand things like this, than this might be closer to non fiction. But I've beat around the bush long enough. To put it simply, this story is about shape shifters.