Players assume the role of Jack Runyan, a retired and highly decorated ex-Navy Seal. After serving his country during the Gulf War, he retired his service due to repeated nightmares about the blood he had shed. Jack still had a burning desire, however, and that was to be a man of the oceans. To fulfil that desire,Jack obtained a contract from the Underwater Mercenary Agency and immersed himself in the open seas. His main objective is to search out any and all treasures that lurk at the ocean's floor. Unfortunately, a group of assassins and greed-mongers are searching for the same treasures