 Although the plot at first appears to be very similar to elements of "Mam'zelle Guillotine", Orczy throws in an unexpected twist.A group of young men who are all ardent royalists, hold secret meetings of the "Club des Fils du Royanne" in the cellar of an old house, where they talk politics and swear allegiance to the young King Louis XVII.An old wastrel called Servan keeps watch for them during their sittings and normally they don't meet unless he is present.