For siblings Caleb and Stevie, "family" was a word defined by survival. After years of bouncing through the cold reality of the foster care system, they were finally saved by Mary Anne—the woman who taught them that love wasn't a transaction, and that siblings didn't have to share blood to be real. Now, life in Los Angeles is looking up. Caleb is a rising star in the brutal world of MMA, while Stevie is a brilliant molecular biology student seeking logical answers to life’s smallest mysteries. But the logic of Stevie's world is about to shatter. When they return to San Bernardino for winter break, Caleb’s twentieth birthday takes a gruesome turn. It starts with the scent of blood and the sound of snapping bone. As Caleb begins a horrifying transformation—sprouting fur and claws in an agonizing display of biology gone wrong—the woman they call "Ma" reveals she’s been hiding more than just their past. With a glowing gaze and ancient chants, the claws retract and the fur dissipates, but the truth is finally out: Caleb and Stevie from a different world, Aureus. Aureus is another world, a sprawling sanctuary where the supernatural and the divine are not myth, but reality. Their parents were slaughtered to steal the crown, and their own powers were bound by a powerful spell to keep them hidden in the human world. Now, the aureum is cracking, and the only way to survive is to break the spell and finish the transformation. Accompanied by their loyal inner circle and a few unexpected allies, the siblings must embark on a perilous journey to find the mysterious sorceress who cast the original spell. She is the only one with the power to break it. If they want to harness their true strength and use their own aureum to reclaim the Aurelian throne from the monster who stole it, they’ll have to give everything they’ve got—and survive a world that has been hunting them since the day they were born.