The year is 1866 and the Pacific Ocean is being terrorized by a deadly sea monster. The U.S. government dispatches marine-life specialist Pierre Aronnax to investigate aboard the warship Abraham Lincoln. When the ship is sunk by the mysterious creature, he and two other survivors discover that the monster is in fact a marvelous submarine—the Nautilus—commanded by the brilliant but bitter Captain Nemo. Nemo refuses to let his guests return to land, but instead taking them on a series of fantastic adventures in which they encounter underwater forests, giant clams, monster storms, huge squid, treacherous polar ice and—most spectacular of all—the magnificent lost city of Atlantis!