Plot
Sagi the red panda and Azul the Indian peacock live on a tropical island in the South Seas. One day, they discover a little girl washed up on shore after a storm, and decide to take her in. A chest washed up with her has the letters "R-O" on its broken nameplate; the animals name the girl Ro, and she grows up playing with them and an Asian elephant named Tika.
Prince Antonio of Apollonia is out exploring the South Seas, and finds himself on Ro's Island. Ro, now a young woman able to communicate with animals, saves him from a float of crocodiles. Antonio invites her to come to Appolonia so she can research her past. Ro agrees, bringing her three friends with her. During the journey, Ro and Antonio begin to fall in love.
In Apollonia, Antonio's parents, King Peter and Queen Danielle, are shocked by Ro's arrival. While Antonio had been away, Peter had arranged a marriage for him to force him to settle down and stop adventuring. Peter immediately dislikes Ro for disrupting his plans; however, Antonio's little sisters Rita, Sofia, and Gina, and Danielle's pet rhesus monkey Tallulah, all immediately befriend Ro and her animals.
Antonio's betrothed, Princess Luciana, arrives in Appolonia with her mother Ariana so that Antonio can meet them. Unbeknownst to everyone present, even Luciana, Ariana is secretly the daughter of a couple of nobles whom Peter demoted to be swineherds after they committed treason. Ariana had moved abroad, married an elderly king to become queen, and has now returned to enact her revenge. Sensing that Ro may be a threat, she sabotages all Ro's attempts to fit in; however, Antonio only falls deeper in love with Ro, and Luciana comes to feel sorry for her.
Ro, demoralized by her "failures," thinks about returning to her island. The animals cheer her up and help her get dressed for a royal ball. At the ball, everyone is impressed by Ro's beauty and grace, and Antonio privately proposes to her. Ro declines, unwilling to defy Peter.
Antonio argues with Peter and abdicates the throne to Rita. He leaves a note for Ro, saying he will run away with her. Tika overhears and hides the note, fearing she may lose Ro. 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 imprisons Ro and her animals, believing they brought the "disease" to Apollonia.
Peter strikes a bargain with Antonio – Ro and the animals will be freed if Antonio marries Luciana. Antonio reluctantly agrees. Shortly after, Ro and her animals are sent away on a ship. Tika realizes her mistake and apologizes for hiding the note, and Ro forgives her. A sailor in Ariana's pay knocks them all overboard; shortly before being rescued by dolphins, Ro has a flashback to the shipwreck in her childhood, and remembers her name is Rosella.
Returning to Apollonia, 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 reveals her mother had forbidden her to eat the wedding cake, claiming it was bad luck. Ariana attempts to flee in a carriage, but is wrecked and flung into a pigsty.
Antonio proposes to Ro, who is at last welcomed into the family. When Ro reveals 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 and Marissa sing a lullaby from her childhood together, proving they are related. Ro and Antonio are married, and 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.
