Sixteen-year-old Eon hopes to become an apprentice to one of the twelve energy dragons of good fortune and learn to be its main interpreter, but to do so will require much, including keeping secret that she is a girl.
In 1888, twelve-year-old Will Henry chronicles his apprenticeship with Dr. Warthrop, a New England scientist who hunts and studies real-life monsters, as they discover and attempt to destroy the Wendigo, a creature that starves even as it gorges itself on human flesh.