Plot synopsis: Two sisters, Jean and Joan Holbrooke, are so close to each other that they speak in unison, love the same man, and have the same dreams. They even make the same slip of tongue in unison. We cannot see the world as they see it, but we do see how the world reacts to them – through the courts and the press, through those that want to help and those who want to use them, through the eyes of beasts both tame and wild, and even through their own echoes in the core of the earth.