"Why the hurry?" Brinan asked.Emosnar sighed, took out a map and tossed it to him "Unless you can fly, it's going to take us four moon cycles to walk to the Cave of the Mammoth Clan " It's 10,500 BC in Northern Europe. Twelve year old Brinan, his older sister Serena and their friends prepare for another long trek in the hope of being reunited with their families. Meanwhile, across the continent at the foot of the Altai Mountains in what will one day...