Dive Alert - Becky - something this game reminded me of the movie "Waterworld" by Kevin Costner. Well, you definitely watched it, it was about a peasant with gills behind his ears, who swam on his trough and met people who were looking for land (the girl had a map on her back). Remembered? Well, that's good.
In a nutshell: there was some kind of explosion in space, and somehow, with its help, water swallowed up land on Earth. Not everyone survived, but those who managed to survive adapted to the new habitat and build mechanical ships, robots. Also, somewhere, the Terra supercomputer created by someone was able to somehow build land, but the entrance there is only by invitation card.
Well, the rest you will draw from the game, which I advise everyone to play!