Under Amarantha's rule, Isarella, the daughter of Thesan, High Lord of the Dawn Court, endured horrors that shattered her spirit and left her scarred in body and soul. Trapped Under the Mountain alongside Rhysand, Isarella's unique gifts became both her salvation and her curse. As a healer with power inherited from her father, she was forced to mend the broken bodies of her captors and victims alike. But beneath her quiet demeanor lay a secret ability: the power to command light itself. With a snap of her fingers, she could extinguish the stars or bring radiant dawn to the darkest of nights-a power she kept hidden, knowing it could bring devastation if wielded recklessly. When Feyre arrived Under the Mountain to free her love, Tamlin, Isarella became an unwilling witness to Feyre's trials. Bound in scraps of clothing and forced to stand alongside Rhysand, she watched Feyre fight against the impossible. And when Feyre solved Amarantha's riddle only to have her life cruelly snuffed out, Isarella made a choice that would change her fate forever. Joining the High Lords, she granted Feyre a fragment of her light, weaving her own power into Feyre's rebirth. Years later, as the war with Hybern looms, Isarella is forced to face the nightmares of her past once more. Reuniting with Rhysand and his Court brings buried trauma to the surface, but it also brings unexpected connections. When Isarella crosses paths with Azriel, the Shadowsinger, her light collides with his shadows in a way that neither of them can deny. Drawn to one another, they uncover secrets that could change the course of the war-and their lives. As Hybern's armies threaten Prythian, Isarella must embrace the full extent of her powers, even if it means confronting the ghosts of her captivity and the pain of standing beside Rhysand once more. Will her light be enough to banish the shadows of her past? Or will her fractured heart and the darkness she once endured consume her entirely?