Tragedy strikes on the first day of Minty's summer holiday and begins a chain of events that leads her back in time and into a desperate struggle with witches, evil spirits and maybe the devil himself.
Minty meets Sarah, a mysterious hooded child from the house, and sees for herself the miserable life that Tom leads as a kitchen boy.
Minty desperately tries to warn the children of the arrival of a ghost hunter in the village.
The sinister Miss Raven comes to stay at Aunt Mary's, and Sarah's terrible secret is revealed.
Minty and Tom witness the cruel game that Miss Vole plays with Sarah.
Minty and Tom set out to rescue Sarah from Miss Vole's clutches ... but it is Hallowe'en!