Magdalys Roca and her friends from the Colored Orphan Asylum are heading southwest on the back of Stella, the giant pteranodon, to find Montez, her brother, wounded during the siege of Vicksburg; now they are heading into the heart of the fighting, depending on Magdalys's ability to communicate telepathically with dinosaurs--but one of the companions is not quite what she seems, and Magdalys's talent could make her a target for both sides.