War of the Sea and Sushi

Far future…
On the eve of the Third World War, the best scientists of the planets founded underwater colonies in the depths of the World Ocean. The nuclear nightmare of the global apocalypse threw the inhabitants of land to the level of primitive savages, who had to painfully restore their civilization for a long time. Two hundred years passed. The underwater colonies have reached unprecedented progress and are ready to strictly defend their interests. They provoke the beginning of the war with land, moving from the tactics of power restraint to an open armed offensive. Employees of the Main Directorate of the Underwater Colonies Mark Aiji and Artemy Valevsky are drawn into the whirlpool of military events. Friends should stop at all costs by the impending new nightmare ...
The winner of the contest 100% science fiction!