Wonder became terror. As civilization crumbled, heroes emerged with the power to breach portal worlds, harvesting their riches and eliminating creatures that conventional weapons could scarcely touch. These mana users—called raiders and users—saved humanity through courage and sacrifice. Six decades later, mana users comprise nearly a fifth of Earth's surviving population. Nestra is not among them. Stripped of a core at birth, she watches baseline humans like herself systematically pushed from law enforcement in the towering city of Threshold. MaxSec, once humanity's shield, now stands as a crumbling sanctuary for the coreless—and Nestra is one of its few remaining operatives. But time is running out. Addicted to mana and desperate for portal access, Nestra clings to her position as her only lifeline. In Threshold's cutthroat landscape, where corporate titans and elite users reign supreme, one misstep means death. Unless Nestra can uncover what truly fractures her biology, she's heading straight into oblivion.