People survive in a dangerous primitive world, relying on a close, almost magical connection with their Creator. In addition to knives, spears and bows and arrows, they are armed with special knowledge that allows leaders and shamans to guess the will of the spirits and control the life of the tribe. And yet one threat – the most terrible – will remain unrecognized until the last, and the world, as those living in it know it, will cease to be the same.