Regency England's feistiest twelve-year-old is back! When Kat Stephenson's family arrive in Bath in search of a suitor for her sister, it's not long before Kat discovers that the town is fizzing with wild magic. Stumbling upon a plot to harness the magic in the Roman Baths, Kat finds that her brother has unwittingly become involved. To foil the plot and save her brother she must defy the Order of the Guardians and risk losing her magical powers, forever . . .