Pavel Demidov and his team of Moscow extreme speleologists turned out to be the discoverers of the deepest secrets of the planet. They set a new world record, the Verevkina cave in Abkhazia, conquered by them, turned out to be the deepest on the planet. Each time, the researchers are not one hundred percent sure that they will return back. But, despite the dangerous floods, they are preparing for the next descent, having collected orders and wishes from scientists from different countries in order to return to them with samples of unique stalagmites and unknown biological species.