20-year-old Fiona Moonstone is the eldest daughter of the Alpha of the Moon River Pack. Although the pack believes she is wolf-less, Fiona feels a mysterious presence within her—a force both ancient and powerful. Isolated and underestimated, Fiona hides her secret, fearing what it might mean. When danger forces a shift, she discovers her power and strength are terrifying. At the Alpha Prince's Mating Ball, Fiona finds herself in the path of Prince Callum Thorne, the Alpha Prince. The prince claims her as his fated mate. Fiona learns about her heritage and the beauty and the danger that is hers, while navigating the royal palace and the threat to her family and her prince.