Libby and May meet one afternoon and begin creating Princess X together.  Over the next three years, their friendship blossoms as they create more adventures for Princess X with May creating the storyline and Libby the illustrations. The two best friends are inseparable until one terrible night when Libby and her mom a careen off a bridge in their car.  May is now sixteen.  She splits time between her divorced parents; Atlanta with her mom and Seattle with her dad.  One day, lonely and bored, in Seattle she spots a Princess X sticker on a store window, and then she sees her everywhere. Who could be doing this?  Is Libby alive?