Once Ekata's brother is finally named heir to the dukedom of Kylma Above, nothing will keep her at home with her murderous family - not even Kylma Below, a mesmerizing underwater kingdom that provides her family with magic. But then they fall under a strange, incurable sleeping sickness, and in the space of a single night, Ekata inherits the title of duke, her brother's captivating warrior bride, and all the dangers of the throne.