Cassidy feels left out. She can't run or kick or swing a bat nearly as well as her friends, Jeff and Nina. Field Day is going to be a nightmare! And to make matters worse, Cassidy finds a creepy old doll in the school basement. She tries to hide it away, but it keeps coming back to haunt her. Even the classroom ghosts are scared boo-less! That's when Cassidy realizes that even though she can't catch a ball, she is really good at something - getting rid of ghosts! Ready or not, here she comes!