Australia. 2151 15-year-old Sakha Leeds decides to spend her pre-graduation holiday in the depths of the ocean. Somewhere there lives her father - a submariner, a man of the sea. It is thanks to his genes that she can breathe underwater, and therefore go on an independent voyage along the Green Continent. But the civilization remaining on the shore does not let go of Sakha: yachts and ships fly overhead, every now and then there are fishing nets, methane mines, power plants, at the bottom you can see cables, pipes - and endless garbage. Moreover, the heads of some concerns are announcing a hunt for underwater inhabitants. And only one of the submarine tribes is not afraid to fight back. Now Sakha understands that she is not just a guest in the underwater kingdom - she is a Mediator who must unite the people of water and the people of air. Can the heroine stop the war?Andreas Eschbach (born 1959) is a popular German science fiction writer known for his focus on environmental issues; four-time winner of the German Kurd Lasswitz Science Fiction Prize. His novels have been filmed several times in Germany and translated into dozens of languages. And the “Antipodes” series (“Submarine” is her second book) has become one of the most discussed in the author’s homeland.