Best friends Fien and Sara come up with the best plans together. One day, they find Nina's friendship book in the library. In it, they read that Nina's greatest wish is to become a princess. Fien and Sara decide to return the book to Nina. And not only that... They come up with a plan to make Nina's wish come true. The plan works, and that makes them want more! There are probably many more wishes that they can fulfill. That's why Fien and Sara set up a secret Wish Club. They put a decorated shoebox in the library, where people can put their wishes. Soon, the first wishes start coming in...