Avalon Yeiss was born in the great city of Raixton, the capital of the Heavenly Realm. Here, Avalon was raised along her older brother Avan and younger sister Averi. She is the prodigal daughter of the great sorcerer Avastin Gregor-Yeiss and Serenity Tarver, daughter of Lucifer. Unbeknownst to Avalon, she is the direct descendant of the strongest being in the Underworld. Avalon and her friends are seemingly the only people in all of Heaven who have no idea about Avalon's heritage. Avan, who was born in the Underworld and raised by their mother before their parent's divorce, remembers it all. The capital, Praxus, his grandfather and the prophecy told to his family right before they departed for Raixton. He remembers the fear laced in his mother's voice when she said her last goodbye to him before moving back home. He was given clear instructions: take care of Avalon until it's time. Well, Avan didn't really know what exactly the time was but he knew it was fast approaching. With the Crown recently arresting Avastin and launching an investigation into the suspected Yeiss involvement in a recent rebellion against the Order of Angels, Avan is sure he needs to keep a close eye on his headstrong sister. However, Avalon plans to evade her overbearing brother and find a way to clear her father's name. She joins forces with her best friends and classmates, Zephyr Hanna and Nineveh Santia, to uncover a multi-layered plot to overthrow the ruling family and to save her father.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.