Sisma, the beggar whose mind held the ancient legacy of the Forerunners, had escaped her claw-and-fang life in the Burrows, with the off-planet Rangers. But the Rangers wanted her in captivity for study by historians. So Sisma and Zass, her winged hunting zorsal, escaped again, taking a stolen lifeboat to an unknown world. A desert where shapeshifting creatures lurked beneath the sand, where Zass and Sisma's hunting skills, psychic powers, and strange...