Morpha has spent her life building bridges through the towering mountain city of Exchange, where glowing Silverite flows like living veins through black stone. But when a mysterious visitor arrives from another world, everything she believes about her home, and the worlds beyond it, is thrown into question. Joined by Prince Aerken of the glittering city world of Abbel, Jan from the great forests of Jantioch, and Deepa from the endless fresh waters of Ploon, Morpha sets out on a journey that will lead them through forgotten passages, ancient mountains, and secrets buried beneath history itself. Some stories are carved into stone. Others survive only in songs.