Hannah has been warned to lock her pony's gate. Suspicious people have been seen in the area and strange things are going on up at High Farm. Hannah's best friend Charley has moved away and her mother's gone off touring. She's alone with her dad, brother, and sister and they are no help at all. What's more her pony is alone too and becoming dangerously overweight. Hannah advertises for a new field companion, only to find herself drawn into the frightening life of 11 year-old Jess and her terrible 'uncle' Pete. Will Hannah, Jess, and new neighbour Tom, manage to defeat the evil Pete and expose the horrible secret hidden in Owls' Wood?