The World's Fair, Paris, 1889: a young inventor meets an enigmatic girl and her pet lion. When they find themselves pursued by a villainous trio intent upon stealing the magical Blue Water, an epic adventure inspired by Jules Verne's masterpiece 20,000 Leagues Under the Sea sets sail. Join Nadia and Jean as they travel the high seas in search of Nadia's homeland and her past, their only clue is the mysterious jewel Nadia wears. Can they unravel the Secret of the Blue Water before it is too late? Find out in Nadia, The Secret of Blue Water.
Jean, a young inventor goes to Paris to compete in an inventor contest at the Universal Expo of Paris. He meets a young girl, Nadia, who is pursued by henchmen that want her Blue Water, a mysterious necklace that is the link to Nadia's past.
Jean takes Nadia home to Le Havre, but his aunt and uncle don't want her at home. So in order to discover her past, he decides to go on an adventure with her to Africa where she came.
Their plane wrecks into the sea. Jean and Nadia are saved by a battleship whose mission is to kill a mysterious monster causing many wreckages in the Army. But soon the battleship is attacked by this monster...
Jean and Nadia land on a small island controlled by the Gargoyle Army. They meet the young Marie, a five years old who just lost her parents. They decide to take her with them.
Nadia and Jean form a plan to escape the island.
While Marie and King are kidnapped by enemy soldiers, Jean and Nadia rush to rescue them. They are being held captive at the secret base of the Neo-Atlanteans. Unfortunately, Nadia's Blue Water gives them away....
During their rescue attempt at secret base of the Neo-Atlanteans, Nadia is kidnapped. Jean However, manages to get the Blue Water and continue on and rescue Nadia, Marie, and King from the clutches of the evil leader of the Neo-Atlanteans.
Grandis, Sanson, and Hanson team up with Jean to rescue Nadia and her friends. Once everyone has been liberated, they aren’t in the clear yet! The whole gang still has to make it out of the fortress alive….
Having escaped Gargoyle's island, Nadia and company are taken aboard the Nautilus. Nadia, meanwhile, is dealing with troublesome issues - she finds it understandably difficult to trust her former enemies and is especially suspicious of Captain Nemo..
The Nautilus gets caught in one of Gargoyle's traps: a mine field in an underwater cavern. Sanson, Hanson, and Jean literally dive into action to remove the mines via the Gratan.
Sanson, Hanson, and Grandis are appointed crew members of the Nautilus. Jean, Sanson, and Hanson study the ship's mechanics while Marie and King have a schooling session. Nadia and Grandis become fascinated how everything is operated by electricity.
Nadia attempts to please Jean by dressing up for him and is upset that he is too busy in his books at the dinner table to notice. Angered, she lashes out at him, but is consoled by the the bewildered Jean.
Nadia is still angry about the baby deer, and is very cold and dismissive of Jean's friendly offers. She also goes to extremes to preach her stand on animal rights, mistreating Jean in the process, despite his attempts to reason with her absurdity.
Marie and Nadia both fall seriously ill, and the Nautilus sets sail for the forbidden lair of the Dinicthys to find the antidote to their sickness.
The Nautilus becomes trapped by Gargoyle once again, which claims the life of a new friend of Jean and Nadia's, but who…?
The Nautilus docks at the underwater kingdom of Atlantis, a truly imaginative and exotic kingdom full of sights and wonders. Also, the last incident against Gargoyle brings Nadia and Jean closer as she cries on him at a funeral.
Jean is tired of being treated like a kid, and attempts to prove his worthiness as an adult when Nadia asks him to build another aircraft. He soon learns, however, that it is important to ask others for help.
The Nautilus sets sail for its base in Antarctica. On their way their, the crew has a run in with a nasty shellfish underneath the iceberg.
Nemo takes Nadia and Jean around the marvelous wonders of his home to introduce them to his best friend, a talking whale named Irion. It is through a mental conversation with this whale that Nadia learns more about her past.
Jean's latest invention goes wrong and almost puts the Nautilus in serious trouble with Gargoyle.
The Nautilus is finally cornered by Gargoyle's battleship and is seen meeting its untimely demise…is this the end of the Nautilus…?
The children are forced to leave via the Captain's cabin, but not before they overhear some revelations about Nadia's past. Electra, moved with jealousy, hatred, and burned love toward the initially aloof captain, goes nuts and draws a pistol on him.
The kids become shipwrecked on a deserted island and have to learn how to survive. What will become of our little castaways?
Nadia thinks she can survive without technology and runs off from the camp leaving Jean and the rest to set up camp with their technology. Soon, Nadia returns back to steal food when she realizes that she can't survive on her own without technology.
Because of Nadia’s escapades, there is very little left to eat, and Jean has no choice but to use meat in the morning omelet. Nadia is very displeased with this and vows to go on a hunger strike and leaves the camp.
Nadia goes crazy over Jean not remembering the night she first kissed him and unfairly yells at him. The next morning, Nadia and Jean embark on a quest to find a missing King. Where could he have run off to and why?
Nadia's ideal vision of life on an island is broken when a terrible typhoon strikes Lincoln Island. The next day, a mysterious floating island drifts near the ocean, and the kids set off to explore it.
The witch and assistants Ayerton spoke of turned out to be Grandis, Sanson, and Hanson. Reunited, our pals set up camp to live on the floating island.
Sanson and Hanson decide to have a race with two mechanical “King” robots that can only run straight!
Jean and Nadia wonder into a mechanical cavern on the island. Nadia suddenly vanishes into a mysterious chamber, leaving Jean all alone. Is their island home REALLY an island? Or is it something else?
Undressed and in a trance, Nadia comes face to face with an entity who tells her that their island home is a spaceship known as Red Noah. Grandis and the others rush to get off the island before it sinks, Jean goes on a rescue mission to save Nadia.
The group crash lands in an African tribal village and are almost put to death by the chief. A young warrior of the village recognizes Nadia's Blue Water and they are set free. Though the warrior is in love with Nadia, she plans to use him to escape.
King gets kidnapped by Grandis's ex-fiancée, Gonzales.
Nadia is ashamed of how she acted in Africa and wants Jean's attention. Jean is concerned for her and asks Sanson for tips on how to deal with her. The next day, he sings a song to Nadia about his love for her and how her behavior is affecting him.
Nadia and the gang finally arrive at her lost homeland of Tartessos, and Nadia reveals to her friends her deepest secrets, including her identity, and that the Blue Water is a dangerous tool that could destroy the world.
Gargoyle's battleships appear over Tartessos. To save Jean and the others, Nadia surrenders herself. Forced to flee from Gargoyle's armada, the group run into Captain Nemo and his crew and now operate a powerful battleship called the New Nautilus.
Gargoyle takes Nadia before the puppet leader of Neo-Atlantis who reveals that he has a strong connection with both Nadia and Nemo. Half a world away, Nemo and the others plan to fight Gargoyle in a final duel.
The New Nautilus and Gargoyle, now on Red Noah, face off in a spectacular duel of explosions and lasers. While fighting, both crafts head into outer space. Nemo and the group are finally able to confront Gargoyle, who now has Nadia under his control.
All the pieces fall into place for the final stage of Jean and Nadia's journey around the world, Nemo and Gargoyle's long-standing feud, and the secret behind Nadia's Blue Water pendant.