In a kingdom, a blonde princess and a brunette
pauper are born at the same time. Several years later, Princess Anneliese is affianced by her mother, Queen Genevieve, to the wealthy King Dominick to save their nearly bankrupt royal treasury; however, Anneliese is in love with her young tutor Julian. The Pauper, Erika, is an
indentured servant, working off her parents' debt at Madame Carp's Dress Emporium, which supplies the palace with clothes; however, she dreams of becoming a singer and seeing the world. Unbeknownst to the Queen, the reason behind the kingdom's bankruptcy is that her adviser Preminger has been
stealing gold and emptying the royal mines. Upon learning from his henchmen, Nick and Nack, that the Queen has arranged Anneliese's marriage to King Dominick, he decides to make Anneliese 'mysteriously vanish'. Preminger plans to pretend that he has found the Princess, earning a betrothal to her, which would allow him to become king himself. Julian takes Anneliese for a day out into the kingdom so that she can be free for once; there, she witnesses the poverty caused by the kingdom's bankruptcy. Anneliese hears Erika performing in the street to earn money but Madame Carp steals the earnings. Anneliese and Erika bond and learn that they are identical in appearance, apart from their hair color and the crown-shaped birthmark on Anneliese's shoulder. That night, Anneliese and her cat Serafina are kidnapped by Nick and Nack, who leave a
forged letter saying she ran away. Julian, doubting the letter, asks Erika to impersonate the Princess, saving the engagement while he investigates. Preminger is surprised when Erika, disguised as Anneliese, presents herself at the palace. Over time, Erika and King Dominick fall in love but Erika worries about what will happen if she is found out. The real Anneliese escapes but the guards, having seen Erika, mistake Anneliese for an imposter. Mistaking Anneliese for Erika, Madame Carp forces Anneliese into her shop and locks her inside. Julian overhears Preminger's plans but is discovered and captured. Anneliese has Serafina take her ring and a tag from the dress shop so someone can find her; unfortunately, Preminger and his dog Midas intercept her. Preminger takes Anneliese to the mines, where she is imprisoned with Julian after Nick and Nack cause a cave-in. Preminger returns to the palace, where he exposes Erika as a fake and has her imprisoned. Preminger convinces the Queen that Anneliese has died and that he has supposedly come into great wealth during his travels. With no other options, she reluctantly agrees to marry him to save the Kingdom. Erika escapes the dungeon by singing a lullaby, causing the guard to fall asleep so she can take his keys. She is aided by King Dominick, who suspects Preminger of lying. Meanwhile, Anneliese and Julian find out how to restore the kingdom's resources with some
geodes filled with crystals; the two then confess their love for each other. Erika's barking cat, Wolfie, unearths a mine shaft, and the group escapes by flooding the room and floating towards the surface in a barrel. At the Queen and Preminger's wedding, Anneliese arrives, proves her identity with her birthmark, and reveals the truth about Preminger. After a brief chase, Preminger is arrested along with Nick and Nack. Anneliese tells her mother that she wants to marry Julian and that they can help save the kingdom. Soon after, the kingdom's prosperity is restored thanks to the crystals in the mine. Madame Carp is no longer patronized by the palace and goes out of business. With her debt finally paid, Erika leaves to become a renowned singer. Before her departure, Dominick proposes to her, Erika politely declines by stating she still wishes to live out her dream as a singer. After touring the world, Erika feels her heart lies at home, and returns to her kingdom where she marries Dominick. Anneliese and Erika have a double wedding, and they and their husbands ride off in a carriage together. ==Voice cast==