Experience the gripping historical adventure tale of young heroes during the end of the Ice Age, a time of melting glaciers, mass extinctions, and unpredictable dangers. When twelve-year-old Twig begins having recurring nightmares about a green light exploding from the sky and causing devastating environmental changes, she knows she must warn her village elders. But before she can, her village is attacked by the evil Thornback raiders. Twig and her companion, Greyhawk have no choice but to find the strange witch-woman known as Cobia. She's the only person powerful enough to save them from the raiders and the coming fiery explosion that will devastate their world and force them on a great westward migration to the mysterious Duskland. But finding Cobia is not going to be easy...and they must do it before the Thornback raiders, dire wolves, and giant bears, find them. Venture with these young heroes as they leave behind their ancestral lands and journey to the mysterious Duskland, far from the only home they've ever known.