Best friends Charlotte and Mia can't bear it when Charlotte's family moves far away. But when they become trainee Secret Princesses they begin an amazing adventure together - and they can see each other whenever they like! Once in a blue moon, a tiara shaped constellation forms high in the sky above Wishing Star Palace. The four girls that make a wish on these special stars get their wishes granted by the Secret Princesses ... but Princess Poison is determined that this year the wishes won't come true ...