She lives in Ghastly-Gorm Hall with her father, Lord Goth, lots of servants and at least half a dozen ghosts, but she hasn't got any friends to explore her enormous, creepy house with.Then, one night, everything changes when Ada meets a ghostly mouse called Ishmael. Together they set out to solve the mystery of the strange happenings at Ghastly-Gorm Hall, and get a lot more than they bargained for...

    Her investigation leads her to three extraordinary people: Jonathan, her new neighbor; Nubia, an African slave; and Lupus, a mute beggar boy. The four embark on a search for the killer ... and that's when the excitement begins