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 -...

Still pursued by the evil Count Olaf, the Baudelaire orphans attempt to reach a very important VFD meeting, but first they must travel in a rattletrap submarine to the Gorgonian Grotto, a dangerous underwater cave, in search of the sugar bowl.