As Onyx Castle and Meredith Huang rise in power, they become targets of even more powerful and dangerous enemies. Not only does the Highdren Powers have eyes on Onyx, but her greatest nemesis is back, plotting to destroy her and everything she holds dear. As if that's not enough, Meredith is cursed with a strange, life-threatening condition. Onyx must do whatever it takes to save her fated mate or lose her forever.