The narrative centers on a couple whose domestic life is disrupted when a charismatic, secretive mystic insinuates himself into their circle, promoting occult rites, seducing loyalties, and provoking jealousies. Friends attempt rational intervention but confront manipulation, fanaticism, and ambiguous supernatural occurrences, producing moral and psychological unraveling. The work is framed by an autobiographical fragment that sketches the narrator’s youthful literary life and early encounters with bohemian and occult personalities. The prose alternates satirical observation with melodramatic episodes to examine credulity, power, and the boundaries between artifice and belief.