Mia, a noblewoman of the prestigious August family, lives happily until her 16th birthday, when she develops the rare “princess in heat” condition—releasing pheromones at the new moon that drive men into uncontrollable desire. Soon after, tragedy strikes: her parents die and her once-kind sister Lilith, the nation’s top magician, becomes harsh toward her. Sent on an errand, Mia is kidnapped by men who intend to offer her to Charles, the dragon-human king, believing she can bear demi-human children.