Marc Lanterne and Monsieur Smith investigate the home of a castellan who is the victim of jealousy, justified by the way, of his wife. Monsieur Dunoyau wants to know the author of the anonymous letters he receives. After a whole series of extraordinary adventures, the truth comes out and Dunoyau is reconciled with his wife.
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Character: Marc Lanterne
Character: Mrs. Dunoyau
Character: Solange
Character: Mr. Smith
Character: Janine
Character: Mrs. Gorien
Character: Character Not Available
Character: Dunoyau
Character: Jérôme
Character: Character Not Available
Character: Character Not Available
Character: Character Not Available
Character: Character Not Available