Twelve-year-old Alexa and her companions unwittingly lead Abaddon, now in the form of an enormous, horrible sea monster, to the secret community known as the Five Stone Pillars when they go to bring the people living there home.

A uge sea monster has attacked and wrecked several ships from beneath the sea. Professor Aronnax bravely joins a mission to hunt down the beast. He goes aboard the Nautilus, a secret submarine helmed by the mysterious Captain Nemo. At first, the mission is exciting, as Nemo takes Aronnax on a voyage around the underwater world. But when things start to go wrong, Aronnax finds there's no escape from the Nautilus. He is now Captain Nemo's captive -...