You play Kevin Codner, our aquatic hero. You hear that the SS Lucifer has suffered some sort of mishap (the exact nature of the incident is not made clear in the game. Somehow the captain is shown pulling the plug from his bath, and a fountain of water shoots up and starts flooding the ship.). Kevin gets into a yellow submarine and begin saving the passengers.
I think this is quite a unknown game. I got my hands on it, because it was cheap, and I liked it because it was one of the few games I didn't pirated on the Amiga.
A compelling thing about this game was that the levels where quite short, and there were always some sort of problem that you had to solve. Everything ran on time, and if enough time lapsed you would drown. Luckily, you got a password for each level you finished so you always could go back and try again.
A nice little game, but not fantastic in any way.