Bonnie and her cousin Sylvia are left in the care of a cruel governess when Bonnie's parents go on a sea voyage. Besieged by wolves without and the terrible Miss Slighcarp within, how are they to reclaim Willoughby Chase?
As the result of an accident a young girl is faced with the responsibility of foiling a Hanoverian plot to put St. Paul's Cathedral on rollers and roll it into the River Thames during the coronation of James IV.