Thirteen-year-old Temych, an ordinary city schoolboy who is used to spending most of his free time in front of a smartphone screen, sets off on an unusual ten-day journey along the Siberian mountain river Mana in the company of forty children and practically without adults. There, in the wild Siberian taiga, in complete isolation from the city amenities and benefits of civilization, Temych for the first time in his entire adult life will find himself without cellular communication, the Internet and the care of loved ones. Now a homemade raft, an oar and real taiga adventures await him.