Set in a future where the world is underwater and humanity is forced to salvage materials from under the ocean. To facilitate this endeavor Submersible Salvage Retrieval Vehicles (S.S.R.V.) are developed to brave the hazards of the ocean. These S.S.R.V. are also used in competition for sport. Natnet is a small diving company that wants to win the annual S.S.R.V. international games and they seek the help of a legendary S.S.R.V. called Scrapper to give them the chance.