In the Fae realm, magic is life-and entering without it means death. For three mortal siblings with hidden half-Fae blood, that truth becomes terrifyingly real when darkness breaches their doorstep. Ry returns from three years of brutal military training in the Fae Kingdom of Qualantia to find his younger brother, Trea, ensnared by a seductive succubus just as his latent magic begins to awaken on his eighteenth birthday. When she vanishes with Trea into the shadows, Ry and Trea's twin sister Sami give chase-unaware that Trea was never the prize, but the bait. Ry is the secret heir to Qualantia's throne, and his grandfather's death has placed him one step closer to power-a power the Demon King of Nethraxis will do anything to claim. As the veil between realms fractures, unleashing the upper demon Kraveth and triggering the rise of Nethraxis, the siblings must confront betrayal, forbidden magic, and the twisted laws of a world where monsters cannot die and nature itself is inverted. To save their brother and protect the Fae Kingdom, they must enter the demon realm-and risk becoming the very weapons darkness has been waiting for.