Knowlton is one of the most haunted places in England, there is an ancient pagan shrine hidden near the ancient ruined church where offerings are left for the village 'Mother'. When lottery winner Aunt Vera invites herself and her treasured cats to stay the whole house is in turmoil. Mum hates her, dad hides away. Presented with a baby blue dress Izzy goes to the Knowle where she stumbles into a solid granite stone that is not there and is transported to a different time where all around people are dying from the Black Death. Izzy can't work it out. It's not as if she did not have enough trouble at school with that bullying Janice. If Bobby would only grow up, he might know what a Hag Stone is for and where it came from.