Revin, a young man from a poor mining town, has pulled himself up by his bootstraps to become the student apprentice of a law professor. But then, everything goes wrong: their airship is captured by pirates and Revin loses his mentor. Born female, Revin must make his way in a world oriented toward men while he struggles with his own identity.
Set against the backdrop of a war between island nations, Revin must navigate a world divided between the aristocracy and the common people. And, as a promising young man, he must choose whom to align himself with — and to serve. But what does Revin's Heart say?