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.
It is early in the 19th century. The thirteen-year-old Hans Christian Andersen (called "Chris" for short; portrayed and voiced by Paul O'Keefe) is known in his native village of Odense, Denmark, as an incurable daydreamer. Actually, the boy's reveries are an escape from the hardships of his family's life.
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.
Zhang Zhen's family had fallen on hard times but remembering the bethrothal agreement between his father and the prime minister, Master Chin, he set off for his fiance's home. When he arrived, he was distressed to receive a cold reception from his future father-in-law, who looked down on him because he was poor and was willing to fulfill his promise only after Zhang Zhen had successfully become the top scholar. He bade Zhang Zhen to stay at the Green Waves Study and prepare.
The daughter of a man who owns a South Seas pearl business falls in love with a wealthy traveler. Her father dies, leaving her the business, but a greedy ship captain schemes to take the business from her.
As the story opens, a busful of tourists are touring Copenhagen. Their guide draws their attention to the beautiful statue at Langelinie. At that, the film's focus moves below the waterline, where several fish tell the story of ...