In this animated movie, Barbie wants to teach her little sister, Stacie, the true value of friendship. So she and her best friend, Teresa, weave a music-infused fairy tale about Liana and Alexa, two peasant girls who have little else but each other and their love of song. When a magic mirror reveals an evil plan to destroy the Diamond Castle and end all music worldwide, Liana and Alexa bravely set out to save the day.
