Grace has proved to the kingdom of Wondermere that when it comes to courage, determination, playing TROLL-O on unicorn-back and being a Brave Knight, she's just as good as any boy! But now Wondermere is expecting a very important visitor: the Mermaid Queen of the Outer Ocean. That means frilly dresses and best behaviour, and absolutely no rule breaking! But when a purple dragon egg falls into the moat of Wondermere castle, Grace and her sister Princess Portia find themselves babysitting a big secret. One teeny tiny little dragon called Dennis couldn't possibly disturb the royal visit, could he?
