NETTIDA. Book 2. Retribution. Farutin A.

2275. The globe is completely covered with water. Residents of flying platforms are trying to preserve the fragile world with the lunar capital, but this is unlikely to be possible after the murder of the Iron King, the only person who knew the secret of the dispensation of the cataclysm. Three young adventurers are trying to penetrate the forbidden sector of underwater tunnels in order to find out the truth about the experiments there. But some secrets are so terrible that it is better not to discover them.