Jesobel Vine wants nothing more than to be a typical Pyxie teenager. She wants to ride her horse, Firefly, shoot her bow, and fall in love with her dreamy best friend, Glyn. But Jesobel is marked not only as the future Royal Starkeeper of Pyxis, but as the Heart of Azimuth-the one to lead her people back to their lost realm-a burden too dangerous for daydreams. As Jesobel struggles to accept her destiny, reluctantly studying mystic magic, she becomes doubtful she will ever be worthy to rule. And when her fiery temper enrages the daemon-possessed Starkeeper of Equuleus with a hex-gone-wrong -igniting an orphic war-Jesobel must find a way to alter the global disaster foretold by a celestial legend.