Welcome to fright night! Mr. Morton's third graders have invited family and friends to visit their classroom. Cassidy, Jeff, and Nina are all set to turn the school basement into a haunted house for the festival. The problem is...the basement is already haunted! And these ghosts don't like visitors!Can Cassidy and her classmates stop the ghosts before they crash the party? Or will their parents find out that the school is haunted...for real?