On such a full sea

In a future where America has been in a long-decline, self-contained labor settlements replace abandoned urban neighborhoods, containing contented workers who devote their lives to the cultivation of pristine produce and seafood for the wealthy residents of distant elite walled villages. Fan, a Chinese descendant, fish-tank diver, and resident of the B-Mor labor settlement, shocks her community by leaving the safety of the walls to search for the man she loves after he disappears.