Someone or something is stealing from the peaceful residents of Buttonville. But is the thief from the real world...or the imaginary one? Ben and Pearl are about to find out. When they report for duty at Dr. Woo's, Mr. Tabby hands them a bucket and a shovel -- for the collection and proper disposal of dragon droppings -- and directs the apprentices to the hospital's roof. Soon, they come face-to-snout with the dragon that lives there and find a pile of proof that he is the thief.Before Ben and Pearl can persuade the dragon to stop stealing, an emergency call comes in from the Imaginary World. The rain dragon has been injured! But with Dr. Woo out of town and Mr. Tabby busy with percolating pixies, time is running out. Will Ben and Pearl finally get a chance to travel to the Imaginary World? Even if it means breaking Dr.
