This book is mainly about a girl named Jessie. She lives with her grandmother, Jessica, and her mother. Her grandmother is the queen of the Realm. Her mother never believed in magic, so Jessie and her grandmother decided to keep it a secret from her mom.
Jessie is invited to a party in the Realm, to welcome a new born baby. The baby's name is Jewel. On her way, she gets stuck in Mud Wobbles path. Then a Water Sprite, called Cool of the Evening, save her from them. In return, she clears a blockage on their small Water Fall.
Jessie made it to the party late. Everyone was waiting for her, so the party can start.
Later, she finds out the blockage was important, because baby Jewel went into the Sprite's lake! Now the Sprites won't give him back, unless they find their Moon Stone.
TO FIND OUT THE END, READ THE BOOK!!! (o: