In this sequel to The Ghost of Fossil Glen, Allie Nichols is back and once again pursued by a ghost who needs help. This time the ghost mysteriously makes Allie volunteer to interview Mrs. Hobbs, the mean and scary cafeteria lady, for her class' annual Elders Day celebration. The more Allie learns about Mrs. Hobbs, the more convinced she is that the lunch lady has done some pretty horrible things in her past. Meanwhile, strange fires keep starting around town. Could Mrs. Hobbs have something to do with them? As Allie pursues her suspicions, she learns that appearances can be very deceptive.