Eithnie is a young painter who is acclaimed by the art world, until the critics start noticing that her work has lost the animating passion that had set her apart from the crowd. She returns to her cabin in Canada's remote woods, hoping to find a place where she can seek solitude and focus on her art.

At first, Eithnie's muse remains elusive, but then beautiful and disturbing creatures start slipping into her sketches unbidden. The following days bring strange visitors bearing cryptic messages indicating that Eithnie may be bound by a promise made in a forgotten, magical childhood. The world of Faerie is clearly reaching out to her for help, and her ability to figure out what they need may mark the difference between their survival and their doom.