In a small French town, the community is thrown into turmoil when anonymous poison-pen letters signed by "Le Corbeau" (The Raven) start circulating. These letters expose secrets and scandalous affairs, causing suspicion and paranoia among the townspeople. The first target is Dr. Germain, a respected but somewhat aloof physician. He is accused of having an affair and performing illegal abortions, which blemishes his reputation and puts him under scrutiny. As tensions rise, various members of the town, from the local schoolteacher to the hospital staff, become entangled in the mystery of who might be behind these divisive communications.

As the letters continue to emerge, trust disintegrates, and neighbors start suspecting one another of being Le Corbeau. Fear grips the community, leading to increased violence and the unraveling of many personal lives. Dr. Germain struggles to maintain his composure while attempting to uncover the identity of the anonymous writer. Relationships fracture as fingers are pointed and accusations fly. The film explores themes of morality, guilt, and the destructive nature of gossip. Against the backdrop of a society under duress, the search for truth becomes both a pursuit of justice and a reflection on human nature’s innate tendency towards suspicion and blame.