In the nineteenth century, Lydia Carlton resides in Scotland, earning her keep as a fairy healer. She belongs to the uncommon few who perceive and converse with fairies, yet no one takes her claims seriously. Edgar requires an expert steeped in fairy lore, and Lydia fits that role perfectly. After saving her, he makes her his employee, but a web of secrets and feelings shadows Edgar, who asserts himself as the Earl of the Blue Knight in the ancient realm of everlasting myth.