In this chapter book adventure, the Mysterious Messenger delivers a basket of coins to the castle. The princesses toss them into the castle moat, and each makes a special wish. But suddenly, strange things start happening in the castle. . . almost like their wishes got topsy-turvy turned around. The princesses soon learn that they should have tossed their coins into a wishing well, so they combine forces and work together to build a magical wishing well in their magical castle. Once Ariel helps retrieve the coins from the moat, they can have a wish re-do! Phew!