Sophronia continues her second year at finishing school in style—with a steel-bladed fan secreted in the folds of her ball gown, of course. Such a fashionable choice of weapon comes in handy when Sophronia, her best friend Dimity, sweet sootie Soap, and the charming Lord Felix Mersey stowaway on a train to return their classmate Sidheag to her werewolf pack in Scotland. But when Sophronia discovers they are being trailed by a dirigible of Picklemen and flywaymen, she unearths a plot that threatens to throw all of London into chaos. With her friends in mortal danger, Sophronia must sacrifice what she holds most dear—her freedom.