In the turbulent years of the French Revolution, two Rosicrucians - Jeanoni and his teacher, Menzur - weave their destiny in a world plagued by materialism and superstition. From the outskirts of Vesuvius to the azure waters of the Ionian Sea, and from the canals of Venice to the Paris of Robespierre, mortals and immortals are entangled in a story where the pure idealist meets the insatiable passion and the Light of Truth clashes with blind ambition, social convention, and base interests. At every step of the heroes, the terrifying figure of the Guardian of the Threshold lurks, invited by the carelessness of a careless student. Written by a true Rosicrucian, Jeanoni is true for those who can understand and a fairy tale for those who cannot.