Caina is a girl of noble birth. Her father loves her and lets her read freely in the library, but her mother had never gotten over being rejected from the study of magic in her fourth year of studies and is cruel to both Caina and her father.
She, in fact, has dealings with renegade sorcerers, and when a scroll falls into her husband's hands, she tries to exploit it. Death and treachery follow, and Caina is long a prisoner of a necromancer who uses her to teach his students.
When she is rescued, and the necromancer escapes, she joins the title Ghosts. It involves several teachers for everything from throwing knives to putting on make-up, a ball, passing herself off a jewel merchant's daughter, a reservoir, an accountant met in a rough tavern, and more.