Ada Goth is the only child of Lord Goth. The two live together in the enormous Ghastly-Gorm Hall. It’s hard for her to make friends and she's rather lonely.
Then one day William and Emily Cabbage come to stay at the house, and together with a ghostly mouse called Ishmael they begin to unravel a dastardly plot.
Ada and her friends must work together to foil the evil gamekeeper, Maltravers, before it's too late!