Samael and Selene's journey continues into the sinister depths of the Underworld, where they must battle against fate itself to keep their love alive or be separated forever. When Selene left her dull life in the human world to be with her demon mate, she was determined to thrive on her own terms. As a recovering people-pleaser, Selene was ready to build a life with Samael in the realm of Aurelia, free from the expectations of others. Yet, she soon realizes that being the fated mate of a demon is far more than she imagined, as a trip to the Underworld forces her to question everything she knows about herself… and her abilities. After decades of loneliness, Samael is ready to heal from his traumatic past. With Selene at his side, he is certain that a reunion with his parents in the Underworld will bring only joy and closure. Although his birthright as prince carries responsibilities, he's not interested in the web of dark politics that permeate his father's royal court. But untangling himself from the ambitions of his parents proves more difficult than he thought, especially when they want to strip him of all that he gained in Aurelia—including Selene. Sam and Selene defied the odds to be together, but in a realm determined to tear them apart, can they still hold onto forever? Bridging the gap between what was and what’s to come, this interstitial novel races toward a breathtaking cliffhanger that will change everything.