The hero of the work finds a mysterious box that has lain for many centuries on the seashore in the thickness of pebble deposits. In the box he finds a manuscript written in completely unfamiliar hieroglyphs. He manages to bring his find to Paris and hand it over to a famous Egyptologist. But then a world war begins. What is the joy of the hero when, after the war, he learns that the find was not lost, moreover, it was translated and contains information about the mysterious Atlantis...