In the center of tropical Africa, in the Congo River basin, lurks the mysterious Likval swamp. It is hidden from prying eyes by a thick cover of impenetrable jungle. Not a single European, not a single expedition that went there, managed to return back. According to rumors, dinosaurs live there, and alien civilizations have created their base. Only Mikhail Kremnev, a young military translator who ended up in the Likval swamp after a plane crash, managed to return two years later. What secret do these places keep, how did Mikhail manage to survive in the African jungle? What adventures did he experience?