The world of the future is a world of misfortunes. Almost the entire long-suffering Earth is covered with water. Humanity has gone to the bottom in the literal sense of the word: people live and work in underwater cities, the largest of which are fighting for dominance. As if they lack nomari, cruel amphibians who dream of eradicating the human race, terrorists who own dozens of submarines... But people are not alone. Nari live next to them - a race of loyal friends and helpers of people descended from bottlenose dolphins...