The best part of summer has lost its sparkle! Jack Frost is at it again! He and his goblins are always causing trouble. This time, they've stolen the three magic hats that make Wetherbury's summer carnival so much fun. If Kylie the Carnival Fairy doesn't get them back soon, the carnival will be ruined! Rachel and Kirsty can't let that happen. They're determined to help Kylie track down the hats! But will they find them in time, or will this year's big carnival be a big flop?