Calys Adelardi, the princess also known as "the human monster", may only be alpha if she can find a strong, kind warrior to champion her cause. She’s determined to marry for the good of her pack, but meeting a playboy werewolf prince makes Calys think twice about her noble priorities. His name is Alejandro Moretti. He’s the strongest shifter she’s ever met, but he seems prouder of his skills in bed than in battle. When he tells her he’d be her Cavaliere, Calys is overjoyed…until she finds out his offer comes with a price. For every instance he does his duty, Alejandro expects Calys to pay it in his bed, whenever and wherever he wants.

In public, the werewolf prince is my bodyguard. But in private, I'm his slave. Calys Adelardi has made two promises for the good of her pack. One is to marry Pasquale, a boring but well-respected panther prince. Second is to follow everything her bodyguard says in the bedroom. The werewolf prince may be a notorious playboy, but he's also the fiercest fighter she knows. In truth, her bodyguard would have also made great husband material - if only he didn't hate her so much. Alejandro Moretti is determined not to fall in love with Calys, the princess also known as the "human monster". But then a serious threat to her life emerges, and Alejandro realizes he has to make a decision once and for all: give in to his feelings…or turn his back on Calys to protect his heart.

Werewolf prince Alejandro Moretti used to be my bodyguard. But now I know I have to let him go. While he’s able to protect my life, he’s also the one breaking my heart. Calys Adelardi has found out she’s not really a human monster. And she may not be a pack princess for long, not when the Panthera suspects her of being a murderess. Alejandro Moretti once thought love was foolish and unreal. But when Calys decides to leave his life for good, he’s forced to confront his fears. Can he find the courage to risk his heart…and if he does, will it be too late to win his princess back?