In a world on the brink of its twilight, a nation thrives in the Land of Dusk by harnessing alchemy. As the Dusk End looms closer, the people scramble to revive ancient alchemic arts in the city of Central. Among them, a young man delves into alchemical studies in Central, while a girl named Escha in a frontier town applies her ancient alchemy expertise to aid others. United by their alchemical prowess, Logy and Escha join forces in the understaffed Development Department, aiming to defy the encroaching darkness and bring prosperity through their shared craft.