Separated from the other Rainbow Warriors, Willow and Keme make a new life with surviving Okanagan First Nations. When Cardiff and his mercenaries threaten the lives of her adopted people, Willow becomes their leader and forms a plan to save them. But can she find happiness in the Rocky Mountain caverns when she longs for her Blackfoot people and mourns the loss of her chance for a safe life in Maniton?

Rainbow Warriors Napa and Ramon long for the open sky and a chance to explore new land. They petition the Guardians of Maniton for permission to scout the Surface in search of the mysterious Ark Two. With anthropologists Charlie and Nick, they set off in a rover-sub to explore the ancient rainforests of s.e. Asia. What begins as a simple scouting trip turns into a rescue mission with more at stake than their own survival.