Twelve-year-old Elodie journeys to Two Castles in hopes of studying acting but instead becomes apprentice to a dragon, who teaches her to be observant and use reasoning, thus helping her to uncover who is poisoning the king.
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.