Ether's emergence transformed humanity's world, bestowing extraordinary abilities while unleashing the Calamities—intelligent monsters bent on mankind's extinction. A millennium after ether's arrival, Sirius, a witty and perceptive young man, navigates the perilous landscape of a transformed civilization. Drawn inexorably into unraveling ether's mysteries and uncovering its enigmatic origins, Sirius discovers that survival alone may not be enough in a world teetering between salvation and annihilation.