The 13th Letter

Concerns a doctor at a Canadian hospital in the province of Quebec who receives a series of poison pen letters. Later, more letters all signed with the mysterious pseudonym "Raven," are delivered to others in the small Canadian town. The wife of the doctor receives a letter accusing her of having an affair. One letter informs a shell-shocked veteran that he is dying of cancer, causing the distraught man to commit suicide. Quickly, the townsfolk begin pointing fingers at all possible suspects. (Wikipedia.org)