What happens after the world has been changed forever? Normally, Rianna would have been the ultimate catch on Mate Day, that special day where a powerful enchantment matches everyone with their perfect mate. Rianna is beautiful, intelligent, and the most powerful witch in her generation. In a world that venerates magic, this should be an unbeatable combination. The problem is Rianna's mother was the most powerful witch before her and she made millions of people vanish. Now Rianna questions if there is anyone who will willingly share their life with her. Learning her mated future is just the beginning. As she struggles to find her place at the greatest court in the world, Rianna must discover who she is, who she can trust, and with whom she can share secrets of the unmeasurable power her mother has willed to her. It won't be easy. Because even if Rianna learns to be someone's mate, someone's confidant, and someone's champion, none of that will absolve her from being Fate's mistress.