When you desire something so much that you'd do anything for it, even bargain with the devil, that's when a human becomes a Void.  But for Caiden Waters, someone who was born cursed, she's the only exception. Unlike the Blackhearts, the humans that made the exchange, she has the burden of living with the weight of this world on her shoulders. That comes with having an empathic ability, her own emotions reflected in the changing color of her eyes, and a conscious glowing heart in her chest. Exposed to the outside world for the first time on her own, Caiden finds herself being pursued by zealous Blackhearts who discover her unique secret. With the aid of the Argenta, her cryptic guardians, and a mysterious Archangel, she sets out to find the reason for her being.