20000 Leagues Under the Sea Level 2 Elementary. An American frigate, tracking down a ship-sinking monster, faces not a living creature but an incredible invention - a fantastic submarine commanded by the mysterious Captain Nemo. Suddenly a devastating explosion leaves just three survivors, who find themselves prisoners inside Nemo's death ship on an underwater odyssey around the world from the pearl-laden waters of Ceylon to the icy dangers of the South Pole... as Captain Nemo, one of the greatest villians ever created, takes his revenge on all society.