On the planet Taldain, one side faces perpetual daylight and the other endless twilight. On the sunlit Dayside, a vast desert dominates the landscape, and the sand itself holds power - white when charged with Investiture from the sun, black when spent. Sand masters can command this sand telekinetically, shaping it into weapons, shields, and tools, but only while standing in sunlight and only at the cost of dehydrating themselves. Kenton is the weakest sand master in the Diem, the guild that has protected and governed sand mastery for centuries. When a devastating massacre wipes out nearly every sand master, Kenton survives and finds himself the acting Lord Mastrell of a guild on the brink of dissolution. The Taishin - Dayside's ruling council - see an opportunity to finally disband the Diem and seize its power. Kenton has two weeks to prove the guild's worth or lose everything his people have built. Meanwhile, Khrissalla, a duchess from Darkside, has crossed the ocean and the brutal border storm in search of a legendary power she believes can save someone she loves. Her arrival on Dayside sets in motion a collision between two cultures that have spent centuries ignoring each other, and draws the attention of forces far older than either. Originally written as a prose novel and adapted into a graphic novel trilogy illustrated by Julius Gopez, Nabetse Zitro, and Fritz Casas. Set on Taldain in the Cosmere, where the Shard Autonomy watches over a world divided between light and dark.