The distant, distant past. The lame Bison, the shaman of the Wise Beaver tribe, sees how the water stream carries away the girl Snezhana and the future hunter, the boy Pykhtun, comes to her aid. The guys find themselves in unknown and hostile places, full of unknown dangers. A saber-toothed beast follows in their footsteps. Supporting each other and not losing hope, Pykhtun and Snezhana try to survive, using the skills and knowledge acquired in the tribe, while waiting for help. But the hunters of the tribe, after an unsuccessful search, decide that the children have died. More than one month goes by like this... The second part of the book presents original practical advice from Pykhtun, a prehistoric hero, to modern young readers about ways to survive in the wild, when you can only rely on yourself. Introducing "Spirits of the River" - the first book of the new historical adventure series A . Prozorov “The True Story of the Stone Age”. For middle school age.