Daphne is off to St Ritas, an exclusive girls boarding school. But it turns out nothing is quite what you would expect at St Ritas; the floor has holes from cannonballs, the smell in the dining room is disgustingly foul, and Daphne discovers the librarian doesnt really exist. But there is a librarians assistant, Emily Lime. And she is really a crime solving genius, who is looking for a new assistant of her own. And booksmart Daphne is just the girl for the job, because mystery and intrigue are about to strike St Ritas and Emily Lime is going to need all the help she can get.