In this story, Barbie takes on the role of Lumina, a mermaid with the unique ability to alter the color of pearls. Full of joy and imagination, Lumina works at a mermaid salon where she creates stunning hairstyles. When the opportunity arises for her to go to the royal ball, her friends dress her in a gown worthy of royalty. During the event, villains attempt to overthrow the kingdom, and Lumina discovers a surprising power within herself, revealing that she is far more than just a stylist.