In the colossal, living tree of Aethelgard, society is rigidly divided by altitude. The impoverished Root-tenders toil in the dark, damp depths, while the elite Canopy dwellers live in sun-drenched luxury, their power absolute and unchallenged.
Elara, a young Root-tender, feels a connection to the Great Tree that others have forgotten. When she discovers a strange, carved symbol on a root and is overwhelmed by a wave of the Tree's profound pain, she uncovers a terrifying truth: Aethelgard is not just aging; it is being systematically drained of its life, and the ruling Canopy is responsible.
Her quest for answers throws her into an unlikely alliance with Kaelen, a disillusioned Canopy Sentinel, and Lysander, a fiery Hearthwood revolutionary. Together, they must decipher an ancient, forbidden language of living symbols the Heartwood Codex to heal the Tree. But to do so, they must ignite a rebellion that fractures their world, pitting the brutal authority of the Canopy against the desperate hope of the lower levels. The fate of their entire world rests on their ability to unite a broken society before the very foundation of their existence crumbles.
