She was supposed to be a "dud", a shiftless wolf sold into submission to protect her father. ​Isabella lived her life in silence, hiding her deadly sword skills and healer’s touch behind a meek mask. To save her aging father, Santiago, she agreed to become the mistress of Gonzalo, the handsome, treacherous cousin of the Crown Prince. But Gonzalo knows a dangerous truth Isabella was never meant to discover: her wolf was deliberately suppressed by her father to keep her hidden, and she is the fated mate of Crown Prince Rodrigo. ​When Rodrigo first sees Isabella at a royal banquet, his wolf recognizes her instantly. But blinded by pride and prejudiced by her status as his rival’s mistress, Rodrigo mentally rejects her, treating her as nothing more than a passing temptation. Seeking a "respectable" Luna, he turns to the calculating Omega, Sienna. ​While working as a caregiver in the palace for Rodrigo’s deaf sister, Sofia, Isabella discovers a terrifying conspiracy: Sienna and Gonzalo are secretly poisoning both Sofia and Rodrigo with wolf venom to usurp the throne. When Sienna’s frame-up fails and Isabella flees into the woods carrying Rodrigo's child, a brutal rogue attack breaks her father's suppression spell. ​Isabella doesn't just shift, she awakens as a primordial Black Wolf, rivaling the Crown Prince himself in size and power. A year later, a humbled, heartbroken Rodrigo finally tracks her down. The coronation is canceled, Sienna's treason is exposed, and the Crown Prince is on his knees. But the "dud" he rejected is gone, and the powerful Luna she became isn't planning to make his pursuit easy.