Plot
Sagi, a red panda, and Azul, an Indian peacock, live on a tropical island in the South Seas. One day, they discover a little girl and her chest of belongings washed up on shore after a storm. They decide to take her in and name her "Ro," as those were the only two letters left on the chests' broken nameplate. Ten years later, Ro (also played by Barbie) has learned to speak with animals and grown to be a beautiful young woman, spending her days playing on the island with Azul, Sagi, and an Asian elephant, named Tika.
Prince Antonio of Apollonia (also played by Ken) is out exploring the South Seas, and finds himself on Ro's Island. She saves him from a float of crocodiles, and Antonio invites her to return with him to his kingdom, so she can find out more about her past. Ro agrees, bringing her three friends with her. During the journey, Ro and Antonio begin to fall in love.
Upon arriving in Apollonia, Antonio's parents, King Peter and Queen Danielle, are shocked when they meet Ro. While Antonio had been away, Peter had arranged a marriage for him so that he can become king and stop adventuring. He dislikes the "wild island girl" for disrupting his plans; however, Antonio's little sisters, Princesses Rita, Sofia, Gina, (also played by Kelly, Becky & Chelsie) and Danielle's pet rhesus monkey, Tallulah, immediately befriend Ro and her animals.
Antonio's betrothed, Princess Luciana, and her mother, Queen Ariana, later arrive in Apollonia so that he could finally meet them. Unbeknownst to everyone, even her daughter, Ariana and her parents committed treason by attempting to kill Peter and Danielle and were demoted to be swineherds by Peter many years ago. Ariana had married an elderly king in order to become a queen and regain her former status, and now she is seeking a way to enact her revenge on Peter; seeing Ro as a threat, she works to sabotage all Ro's attempts to fit in. However, this causes Antonio to fall more in love with her, and kindhearted Luciana feels sorry for her.
Ro, demoralized by her "failures," thinks about returning to her island. Tallulah, Sagi, Azul and Tika cheer her up and help her get dressed up for the royal ball. At the ball, everyone is impressed by Ro's beauty and grace, and Antonio privately proposes to her. However, Ro refuses, reminding Antonio of his duty to obey his father.
Antonio argues with Peter and abdicates the throne to Rita. He leaves a note for Ro, saying he will run away with her. Tika, jealous of Antonio and afraid of losing Ro, overhears and hides the note. Meanwhile, Ariana sends her pet rats to spread "sunset herb" through the kingdom. The poison causes all animals who ingest it to fall into a coma, including Tallulah and Azul. Peter, concluding Ro, Sagi, Azul, and Tika had brought the "disease" to Apollonia, imprisons them.
Peter strikes a bargain with Antonio – Ro and the animals would be freed if Antonio married Luciana. Antonio reluctantly agrees. Shortly after, Ro and her animals are sent away on a ship, and Tika, realizing her mistake, confesses to Ro about hiding the note and is forgiven by her. A sailor, bribed by Ariana, knocks them all overboard. In the water, Ro suddenly remembers the shipwreck that happened in her childhood and that her real name is Rosella.
Returning to Apollonia with the help of dolphins, Ro learns from a little bird that Ariana had put sunset herb in the wedding cake to kill Peter and Antonio. Ro makes an antidote to wake Azul and the other animals, but is stopped by guards. Tika disrupts the wedding and gets Antonio to come to Ro's rescue, while Sagi takes the antidote to Tallulah, waking her. When Ro accuses Ariana, no one believes her; until Luciana, remembering her mother had forbidden her to eat anything after the wedding, agrees with and defends Ro. Ariana attempts to flee in a carriage, but is wrecked and flung into a pigsty.
Antonio proposes to Ro, who is welcomed into the family. When Ro reveals she remembers her full name, one of the wedding guests, Queen Marissa of Paladia, comes forward and says that her daughter, Princess Rosella, had gone overboard in a shipwreck while they were at sea many years ago. Ro's memory returns, realizing she's the long-lost princess of Paladia, and she and Marissa then sing a lullaby from her childhood together. Ro and Antonio are then married, while Luciana meets a handsome prince at their wedding. Ro and Antonio then sail off to go on new adventures, with Tika, Sagi, Azul, and Tallulah in tow.
