Eighteen-year-old Liobhan is a powerful singer and an expert whistle player. Her brother has a voice to melt the hardest heart, and is a rare talent on the harp. But Liobhan's burning ambition is to join the elite warrior band on Swan Island. She and her brother train there to compete for places, and find themselves joining a mission while still candidates. Their unusual blend of skills makes them ideal for this particular job, which requires going undercover as traveling minstrels. For Swan Island trains both warriors and spies.

In exchange for help escaping her long and wrongful imprisonment, embittered magical healer Blackthorn has vowed to set aside her bid for vengeance against the man who destroyed all that she once held dear. Followed by a former prison mate, a silent hulk of a man named Grim, she travels north to Dalriada. There she'll live on the fringe of a mysterious forest, duty bound for seven years to assist anyone who asks for her help. Oran, crown prince of Dalriada, has waited anxiously for the arrival of his future bride, Lady Flidais.

Sixteen-year-old Neryn is alone in the land of Alban, where the oppressive king has ordered anyone with magical strengths captured and brought before him. Eager to hide her own canny skill - a uniquely powerful ability to communicate with the fairy-like Good Folk - Neryn sets out for the legendary Shadowfell, a home and training ground for a secret rebel group determined to overthrow the evil King Keldec.

One bitter Midwinter's Eve, everything changes when Bridei finds a child on their doorstep - a child abandoned by the Fair Folk. It is the height of ill fortune to have truck with the Fair Folk, and all in the area counsel the babe's death. But Bridei sees an old and precious magic at work and, heedless of the danger, fights to save the child. Broichan is wary but relents, for Bridei must grow to be his own man and make his own decisions.

Cambridge professor Emily Wilde is good at many things: She is the foremost expert on the study of faeries. She is a genius scholar and a meticulous researcher who is writing the world’s first encyclopaedia of faerie lore. But Emily Wilde is not good at people. She could never make small talk at a party—or even get invited to one. And she prefers the company of her books, her dog, Shadow, and the Fair Folk to other people. So when she arrives in the hardscrabble village of Hrafnsvik, Emily has no intention of befriending the gruff townsfolk.