Agatha is a Hawk, brave and fierce, who patrols the high walls of her island home. She takes pride in her duties, though some in her clan whisper that she has only been given them to keep her out of the way, because of the condition she was born with. Jaime, thoughtful and anxious, is an Angler, but he hates the sea. To make matters worse, he's been chosen for a duty that has been outlawed by the clan for generations: to marry. The elders won't say why they have promised him to a girl from a neighboring island, but there are rumors of approaching danger. When disaster strikes and the clan is kidnapped, it is up to Agatha and Jaime to travel across mainland Scotia, a land devastated by a mysterious plague, where forgotten magic and dark secrets lurk in every shadow.