barbie and the 12 dancing princess

Barbie stars as Genevieve, one of twelve princesses who live in a castle with their widowed father, King Randolph. The princesses have adventurous and free-spirited natures that are viewed as "unladylike" and "non-proper" by other members of the royal society. This leads King Randolph to summon his cousin, Duchess Rowena, to the castle to help raise the princesses. Unbeknownst to King Randolph, Rowena plans to poison him and get rid of his daughters so that she can become queen. Attempting to break the princesses' spirits, Rowena makes their lives miserable by stripping the castle of everything they love, banishing singing and dancing.
The princesses find comfort in their late mother's favorite story, which tells of a magical kingdom where golden flowers grant wishes and princesses can dance at an enchanted pavilion for three nights. The princesses realize that the story contains clues on how to enter the magical kingdom from their own bedroom, by dancing on specific stones on the floor. Now inside the magical kingdom, the princesses discover that the water there possesses healing properties.
The next day, the princesses appear tired and the duchess finds their new dancing shoes worn through, arousing her suspicion. The royal cobbler and Genevieve's love interest, Derek, comes to fix their shoes and sees that they are covered in gold dust. When King Randolph mysteriously falls ill, Genevieve is prompted to ask Derek to investigate Rowena's true intentions. That night, the princesses return to the magical kingdom to dance. During this time, Derek discovers that Rowena is stealing heirlooms from the castle and dealing with an apothecary, and he rushes back to the castle.
The next morning, the sisters are again exhausted. Rowena interrogates and threatens them, but when they tell her the truth she refuses to believe them, forcing the princesses into servitude. Heartbroken, they return to the magical kingdom, and Rowena finds the princesses gone the next morning. That evening, Derek makes it back to the castle but discovers that the princesses are missing. He sneaks into their bedroom and, remembering the dance Genevieve had shown him earlier, enters the magical kingdom to report his findings to the princesses. Rowena's monkey minion, Brutus, watches as Derek enters the magical kingdom and reports what he has seen back to Rowena. Rowena uses this knowledge to enter the magical kingdom, where she steals some of the gold flowers that grant wishes. Rowena then returns to the castle and destroys the gateway to the magical kingdom.
The princesses and Derek are trapped in the magical kingdom. However, they eventually discover that, when Genevieve and Derek dance together, everyone floats up into the sky and they are able to return home through a different gateway that leads to their mother's dance pavilion.
Upon returning, they learn that Rowena has taken over as queen. The princesses break into the castle to confront her. After a struggle, Rowena uses the gold flowers to wish that Genevieve dance forever. When the flower dust comes towards Genevieve, she uses her fan to blow the dust back towards Rowena, who begins to dance. When Rowena's footman tries to help her, he is pulled into the dance, too, and the two villains dance their way out of the castle.
Lacey then uses some water brought back from the magical kingdom to heal their dying father. When he heals, King Randolph explains that Rowena had been poisoning him and apologizes to his daughters for not believing them. With the conflict resolved, Genevieve and Derek celebrate their wedding.