The film is about Ravi Chandra (Venkatesh), the film's hero and Sagara Kanya (Shilpa Shetty), a mermaid. Malashree plays Ganga, Ravi's cousin who loves him. They stay with some comedians in a house near the seashore. Kaikala Satyanarayana, the villain of the film, tries to acquire a ship which drowned with a lot of treasure on board.
Jack Carlisle is a disillusioned 13-year-old boy. His mother is always away at work since his father left. He decides to run away, as he feels his mom won't miss him. As he is ready to leave, his nanny convinces him to read a 'magic book' that belongs to her. The book is about a pirate adventure on Magic Island. As Jack reads the book, he is sucked into the world and goes on numerous adventures with Prince Morgan, while fleeing the evil Blackbeard the Pirate. He is even saved by Lily, a beautiful mermaid, whom he falls in love with. Lily is given the power to turn into a human and accompanies Jack on his adventure. Along the way, Jack encounters sand sharks, a tree that grows the favorite food of the person who climbs it, and a cursed temple full of treasure. Jack also uses items he brought along with him in his "magic" bag to stop the pirates. Eventually Jack is able to return home. He wakes up to his loving mother, and finds that his jeans are now torn and frayed and the flag on Prince Morgan's ship has transformed into his bag—signs that his adventure may have actually happened.
In the opening scene, a young boy named Chi is on a boat with his mother and her boyfriend. He falls overboard and almost drowns because he cannot swim. However he ends up on a beach, and claims that he was rescued by a "big fish".
Lena is a princess mermaid, sea king's daughter who dreams of someday marrying a wonderful human prince. After disobeying her father, Lena visits the sea surface (after being yanked by a whirlpool) and first sees the Prince Stephan, falling madly in love. Soon after, the ship that sails the Prince Stephan sinks and the youth's life in danger until Lena manages to save him and bring him to a beach near the school where he studied. Lena comes to the aid of the witch Cassandra and exchanges her voice for legs to walk on land and meet her prince. Cassandra gives Lena what she asks for with the warning that if Lena fails to win the heart of Stephan, she will become sea foam for the rest of her life. Lena drinks the potion, loses her voice, and goes to the surface. Above, she walks on shore naked (except for her shawl, flower necklace and the wreath of pearls her sister Tris gave her for her birthday). She is later helped at the palace by two doves, Cecil and Claudia. Things are going well, but Lena is dumb. Prince Stephan takes a fondness to her, as he feels he should show her the same kindness that the person who had saved him from the wreck showed him. Over time, Stephan falls in love with Lena and wants to marry her, but then comes Anna, the young princess who earlier found Stephan and Cosgrove on the beach and brought them to the medical care they needed. Stephan agrees to marry Anna, but Anna is in love with Maxwell. Vink, the dolphin pet friend of Lena, intervenes and tells the king of the sea what happened. His intervention fixes things, King Malcolm agrees to make Maxwell his son-in-law, and Lena finally marries Stephan, saving her life.
Peter Banning is a successful corporate lawyer who spends more time at work than with his wife Moira and children Jack and Maggie. The Bannings fly to London to visit Moira's grandmother, an older Wendy Darling, to celebrate her charity work for orphans, which once included Peter. During the visit, Peter is distracted by phone calls from his office and on one occasion, shouts at his children when they interrupt him, leading Moira to throw his cellphone out of an open window. Later, while Peter, Moira, and Wendy attend a banquet ceremony hosted by Great Ormond Street Hospital, a strange presence abducts Jack and Maggie. Tootles, another of Wendy's orphans who lives at her house, informs Peter that Captain Hook took the children to Neverland. Peter dismisses Tootles' warning and calls the police instead. With no sign of the children anywhere, Wendy informs Peter that he is actually Peter Pan and that he lost his memories of Neverland when he decided to stay in London with Wendy many years ago. Once again, Peter dismisses these claims and waits for the police to find his children.
Ariel, a sixteen-year-old mermaid princess, is dissatisfied with underwater life and is curious about the human world. With her best friend Flounder, Ariel collects human artifacts and goes to the surface of the ocean to visit Scuttle the seagull, who offers very inaccurate knowledge of human culture. She ignores the warnings of her father King Triton, the ruler of Atlantica, and his adviser and court composer Sebastian that contact between merpeople and humans is forbidden.
L'histoire se déroule quatre ans après le film. Allen Bauer et sa femme Madison (une sirène) vivent sur île déserte méconnue. Allen s'ennuie : Freddie, son frère et la vie new-yorkaise lui manquent. Madison a un pouvoir hydrokinétique qui lui permet de voir et de communiquer à distance en traçant un cercle à la surface de l'eau. Consciente de la tristesse d'Allen, elle lui montre ce qui se passe à New-York. Allen réalise alors que l'entreprise familiale qu'il a laissée à son frère est en fâcheuse posture. Il décide alors de retourner à la civilisation (ce qui contredit la fin du film de 1984, où l'on apprenait que si Allen choisissait la mer, il ne pourrait jamais revenir).
As an eight-year-old boy, Allen Bauer (David Kreps) is vacationing with his family near Cape Cod. While taking a sight-seeing tour on a small boat, he gazes into the ocean and sees something below the surface that fascinates him, while his older brother Freddie Bauer is walking around the boat fascinated by the women. Allen jumps into the water, even though he cannot swim. He grasps the hands of a girl who is inexplicably under the water with him and an instant connection forms between the two. Allen can now breathe under water as he is in the hands of a mermaid. However, Allen is pulled to the surface by the deck hands and the two are separated, though apparently no one else sees the girl. After the ferry moves off, Allen looks back at the girl, who dives underwater showing her mermaid's tail. Allen comes to believe the encounter was a near-death hallucination, but his bond with the mermaid proves so strong that his subsequent relationships with women fail as he seeks the connection he felt with the mermaid.
Sudsakorn, the son of a mermaid and a minstrel prince, fights on different occasions, an elephant, shark, and dragon horse, and encounters in his meanderings a king, a hermit, a yogi, a magic wand, and ghosts.
La petite sirène sauve un prince de la noyade et tombe amoureuse de lui.
Pour vivre avec lui, elle fait un pacte avec une sorcière maléfique : sa belle voix contre une vie sur la terre...
Cela semble fonctionner mais la mémoire d'une princesse étrangère le hante encore : celle qui l'a trouvé sur la plage où la sirène l'avait quitté...
À Prague, au bord de la Vltava, vivent les sept derniers ondins de Bohême. Leur chef, M. Wassermann, se sert de la famille de sa femme comme de leurs employés. Il y a les frères Bertík, Karel, Alois Vodičky et la fille de ce dernier, Jana. M Wassermann les tient en respect à l'aide d'une baguette magique qui peut les transformer en animaux ou en objets.