Is Allie being haunted -- again?

Just a few short weeks ago, Allie encountered her first ghost, the spirit of a murdered girl. Now another ghost has entered Allie's life! The ghost points Allie in the direction of Mrs. Hobbs, the scary cafeteria lady. Did Mrs. Hobbs have anything to do with the death of the ghost? Allie's life suddenly becomes complicated, with mysterious fires breaking out wherever she turns. Her best friend is mad at her, and soon she is in danger, along with her little brother -- but from whom?