Ships are disappearing all over the world and it believed to be caused by a sea monster. Dr. Pierre Aronnax, author of the book The Mysteries of the Ocean Deep, his companion Conseil and Canadian harpooner Ned Land are hired by the U. S. government to help put and end to this mystery by joining an expedition on the Abraham Lincoln. After months of searching the Abraham Lincoln finds its quarry and in the ensuing collision, Dr. Aronnax, Conseil and Ned Land are thrown overboard. In their efforts to survive, the trio find themselves on the surface of the "monster" itself, which turns out to be a submarine. Captain Nemo allows the trio to remain alive on board his submarine, the Nautilus, as his permanent guests, meaning he will never allow them to leave to reveal his secrets. The Captain uses this meeting with Dr. Aronnax, whose book he has read, to begin a new cruise through the oceans and seas of the world, so that he can show Dr. Aronnax where his book was lacking in details meanwhile, Ned Land's primary interest in escape.