On the world of Confluence, where thousands of bloodlines compete for position in a society abandoned by its creators, the mysterious appearance of a youth of indeterminable heritage portends either the world’s end or a new beginning. Yama’s search for his origins leads him from the faded necropolis of Aeolis to the fabled metropolis of Ys, bringing him closer to the secret of his past while simultaneously plunging him into the midst of a convoluted war of politics and religion.