A huge mysterious sea monster has attacked and destroyed several ships from beneath the sea level. Professor Arronax joins a mission to hunt down the beast , but together with a harpooner Ned Land, he himself becomes a victim. 

          He goes aboard the Nautilus, a secret submarine invented and created by the mysterious Captain Nemo. At first, the mission is interesting and exciting, as Nemo takes Professor Arronax on a voyage around the underwater world. But when it turns out that there’s no escape from the Nautilus. They are all now Captain Nemo’s captives.