When fourteen-year-old Emmaline Cayley is sent off to boarding school, all she can think of is escape. For St Grimelda's School for Young Ladies is not only strict, severe and forbidding - it's the strictest school in the world! It also hides a terrible secret and a mysterious way of keeping its prisoners, er its students, in line. With the help of her new friends, Emmaline must devise a plan to escape. But no one has ever escaped from St Grimelda's. And our heroine soon realises that the only way out is to face her greatest fear.