Barbie and her devoted pet sidekick, Pupcorn, fly high on fun hoverboarding adventures across a beautiful, far-off planet. One day, everything changes when the twinkling galaxy stars start to dim and slow their dance in the sky. Although nervous about leaving her home, Barbie travels to Capital Planet to join a special rescue team on a mission to save the stars. Once there, she meets galactic hoverboard champion Sal-lee and a team of talented new friends. Barbie soon discovers that if she listens to her heart, and with the help of her friends, she might be the leader the whole universe has been waiting for!