Sacrificed by her father to Ravek, the fearsome Blackclaw leader, Cassia is forced into a brutal marriage in exchange for dragon protection. Initially resisting Ravek's dominance, she soon awakens her dormant dragon-calling bloodline. As they face political conspiracies and enemy attacks from the Frostkin together, Cassia tames the mythical beasts, claims her power as Queen of the North, and ultimately finds true love with Ravek amidst a fierce war.