Mainly tells the story of Nautilus. 1866, some people thought they saw a narwhal at sea. French naturalist Pierre Aronnax (also translated as Arona X) finally discovered that it was a submarine named Nautilus. He, his servant Conseil (also translated as Conseil) and a whaler Nederland (also translated as Nederland) were captured by Nemo (also translated as Nemo). Nemo is a mysterious figure with unknown nationality. The submarine he secretly built on a desert island is not only extremely strong, but also exquisite in structure. It can use the ocean to provide energy. They live on all kinds of animals and plants in the ocean. The submarine captain also gives preferential treatment to prisoners; In order to keep his secret, Nemo, the captain of the submarine, never allowed them to leave again. Pierre Aronnax and his team had no choice but to follow the submarine around the ocean. During the trip, Pierre Aronnax and his party encountered countless beautiful scenery and experienced many thrilling adventures, such as 1. In Papua New Guinea, their ship ran aground and was attacked by local aborigines. Captain Nemo used his lightning to stop the natives from entering the Nautilus. 2. In the Antarctic, they were trapped under the thick ice, and the ship was extremely short of oxygen. But everyone on board took turns to break the ice sheet at the bottom 10 meter thick with tools and fled to the sea. In the Atlantic Ocean, Nautilus is troubled by octopus. They fought hand-to-hand with axes and octopus, and a crew member died tragically. Nautilus was bombed by a British destroyer in the North Atlantic. Except for the three prisoners, everyone was indignant and sank the destroyer with the attack angle of Nautilus. In the Pearl Farm in the Indian Ocean, there was a fight with sharks, and the whaler Ned Lan cut a fierce giant shark. The seabed in their eyes is sometimes beautiful and intoxicating; Sometimes it's dangerous. It's a close call. Through a series of strange things, Pierre Aronnax finally learned that the mysterious Captain Nemo still kept in touch with the mainland, and supported the just struggle of the people on the land with millions of gold and silver in the sunken ship. Finally, ten months later, by coincidence, the three men finally escaped from the submarine Nautilus under the extremely dangerous situation that the submarine mistakenly entered the Meyer Strait. At this time, naturalists can reveal the secrets of the seabed.