 Nadia: The Secret of Blue Water is a Japanese TV Series which is loosely based upon Jules Verne s 20000 Leagues Under the Sea. It is about a young girl Nadia and a boy she meets, Jean, while performing with a circus. After being confronted by jewel thieves who are after her mysterious Blue Water pendant, Nadia and Jean set off on a journey across the world, under the seas, and eventually other planets, while traveling on the Super Sea Cruiser Nautilus.