Mock-gothic children's drama set in Victorian England, based on the novel by Joan Aiken. Bonnie (Emily Hudson) and her cousin Sylvia (Aleks Darowska) are left at home in Willoughby Hall while their parents travel abroad, with only the servants and the prowling wolves for company. Things get even worse for the girls when evil-looking governess Miss Slighcarp (Stephanie Beacham) mysteriously turns up at the Hall, bearing news that Lord and Lady Willoughby have gone missing overseas and that she will henceforth be in charge of the house and the children's education.