Miss Elizabeth Knight received an unexpected legacy upon her uncle's death: a collection of occult books. When one of the books begins talking to her, she discovers an entire world of female occultist history opened to her-a legacy the Royal Occult Society had purposely hidden from the world. However, the magic allowing the book to speak to Miss Knight is fading and she must gather a group of female acquaintances of various talents. Together, they'll need to work to overcome social pressures, ambitious men, and tyrannical parents, all to bring Mrs. Egerton, the book ghost, back.