In this world, too, it was not possible to prevent the First World War. The civilization of “Darwinists”, based on genetic engineering, clashed with the civilization of “tinsmith” mechanics, hordes of mutant monsters opposed the steel armadas. But the fate of the war will be decided not on the European battlefields, but on the Bosporus, where the living flying ship “Leviathan” is heading on a diplomatic mission ". By the will of circumstances, Prince Alexander, the son of the deceased Austrian Archduke Ferdinand, becomes a key figure in the struggle between the British military, German spies and Turkish revolutionaries. He must defend his right to life and freedom by winning a dangerous game, where the main prize is power over the vast Ottoman Empire. And his girlfriend, the brave Deryn Sharp, must protect her love and at all costs keep her secret...