Step into another magical and fun adventure with the twin detectives to solve this new mystery. There are clues at every turn, ghostly dreams with strange messages, and a surprise visitor that shakes things up. Even Aunt Gigi and Mianna are at a loss to provide any assistance to the boys.Will Davey & Derek be able to solve this mystery of the bells? Where do they turn? Will they be able to put all the clues together? Can they use their new birthday...