What do you do if you’ve already spent six years in the Stone Age of a parallel universe and have achieved a certain level of success? Right—move forward, consolidate what you’ve reached, and develop new chapters in the history of the Stone Age. But all of that can be lost in a single moment, and you become a captive of a terrible tribe of cannibalistic Neanderthals. Your loyal comrades float away, sure of your death—and you’re left alone with yourself again. A continuation of the adventures of the Russian cosmonaut Maxim Serov, who by chance ended up in the Stone Age of a parallel Earth.