बार्बी stars as Genevieve, a princess with eleven sisters: Ashlyn, Blair, Courtney, Delia, Edeline, Fallon, Hadley, Isla, Janessa, Kathleen and Lacey. Each princess is beautiful and different, but the twelve sisters have one thing in common: they all प्यार to dance. They live in a गढ़, महल with their widowed father, King Randolph. Randolph loves his daughters deeply, but at times can't understand them and feels that they should act और like "proper" princesses. The girl's adventurous and free-spirited natures are viewed as "unladylike" and "unproper" द्वारा other members of the royal society and often leads them to make rude टिप्पणियाँ about the princesses. This both disheartens and hurts Randolph. Believing his daughters need a woman's touch, the king summons his cousin, Duchess Rowena, to the गढ़, महल to help raise them. However, Rowena has her own plans, which includes getting rid of Randolph and his daughters so she can take over the kingdom.

Sensing trouble, Genevieve and her sisters try to reason with Randolph, but due to Rowena's interference, the king doesn't believe them and says they must listen to his cousin. Attempting to break the girls' spirits, Rowena makes the princesses' lives miserable द्वारा stripping the गढ़, महल of everything they प्यार and having them practice "proper" behavior, like fanning. She even banishes dancing and गाना from the castle. Sad with the changes, the princesses find comfort in their mother's प्रिय story, which tells of a magical kingdom where सोना फूल grant wishes and a princess could dance at an एनचांटेड pavilion for three nights. They later discover that the story is true. Lacey, the youngest, sees that her lily matches the lily on the floor. Genevieve tells everyone to find a match on their book to a stone. Genevieve tries dancing from stone to stone; it doesn't work. She then tries dancing from oldest to youngest (which is actually stone-to-stone, only in an alternating up-down pattern); Lacey's stone doesn't work so she twirls three times, like the character in the story. They enter the magical kingdom and end up dancing the night away.

Lacey, the youngest, falls and scrapes her knee. Genevieve dabs water from a nearby फव्वारा on the cut and it instantly heals, revealing that the water there is magic. The अगला day, the girls are tired and the duchess finds their new dancing shoes worn through. Suspicious, Rowena believes that they were out dancing with princes. Meanwhile, the royal मोची and Genevieve's प्यार interest, Derek, comes to fix their shoes and sees that they are covered in सोना dust. Genevieve dances on the मोज़ेक in the pavilion outside, (the same dance that opens the magical door hidden in their bedroom floor), that is identical to the one in their bedroom. While together, Genevieve asks Derek to find out what Rowena's true intentions are. The duchess continues to deprive them of any enjoyment and prevents them from visiting या गाना to their father, who has suddenly fallen ill. The doctor gives Rowena a tonic for Randolph, which she quickly disposes of, revealing that she is poisoning him.

That night, Rowena has her footman, Desmond, stand guard outside the princesses' room to find out where they go. The sisters sneak back to the magic realm and dance well into the night again. Meanwhile, Derek discovers that Rowena is stealing heirlooms from the गढ़, महल and dealing with an apothecary (presumably for the poison). He hurries back to warn Genevieve and her sisters. The अगला morning, the sisters are still exhausted and Rowena demands to know why. When she gangs up on Lacey, the girls tell her the truth, but she doesn't believe them and forces them into servitude. That night, she demands the truth again, but they tell her the same story. This makes Rowena even angrier and she locks them in their room, blaming them for Randolph's failing health. Hurt द्वारा her cruel words and due to a misinterpreted conversation between the king and Rowena, the girls can't help but feel that she's right and that their father would be better off without them.

Heartbroken and not knowing what to do, the princesses return to the magical kingdom. A furious Rowena finds the sisters gone the अगला morning. That evening, Derek finally makes it back to the castle, but discovers that the princesses are missing. Determined to find Genevieve, he sneaks into their bedroom. Remembering Genevieve's dance pattern, Derek enters the magic realm and reports his findings to the girls. Unfortunately, Rowena learns how to enter the magic realm, due to her monkey, Brutus. Stealing some फूल that can give आप whatever आप want, she quickly returns to the गढ़, महल and has Desmond destroy the मोज़ेक that forms the gateway, trapping the sisters and Derek in the magical kingdom.

Thinking she has disposed of the princesses, Rowena then tricks the weak King Randolph into making her अभिनय क्वीन until he recovers. Trapped in the magic realm, the girls and Derek try to find a way out. Genevieve eventually learns that it is only द्वारा dancing with Derek that she can open another entrance back to their world. As they dance, the couple and the rest of the princesses float up into the sky and return home. However, this new gateway leads to their mother's dance pavilion (that is identical to the pavilion in the magic realm) instead of their bedroom. Once back, the sisters and Derek discover that Rowena is now queen, new guards (hired द्वारा Rowena) have been ordered to capture any stray princesses, and the princesses overhear that their father is dying.

Using their diverse talents, the princesses disable the guards and enter the गढ़, महल to confront Rowena. Ignoring Genevieve's orders, Lacey enters the गढ़, महल to help, but is seized द्वारा Desmond. Derek and Genevieve defeat the एनचांटेड सूट्स of armor that defend Rowena (using her magical फूल that she चुरा लिया from the entrance to the Magic Pavilion), but the duchess has the upper hand when Desmond drags in Lacey. Noting that Genevieve is the स्रोत of her sisters' resistance against her, Rowena uses the फूल to wish for Genevieve to dance forever and ever and ever. But as the फूल dust comes towards her, Genevieve produces her प्रशंसक and blows it back at Rowena, who starts dancing instead. Desmond soon joins her while trying to help and the two villains dance their way out of the गढ़, महल and down the valley.

It is revealed that Lacey has saved some water from the magical Pavilion. She gives it to her father and thereby heals the dying king. Randolph explains that Rowena was poisoning him and apologizes to his daughters for not believing them. He now truly understands them, and realizes they will do great things and be wonderful princesses द्वारा just being themselves just like their mother told him. The film ends with everything made right as Genevieve and Derek celebrate their wedding.