The 13Th Letter

In a small town in French Canada, Smith, the wife of doctor Boyer, receives a letter accusing her of having an affair with young doctor Rennie. Soon more poison-pen letters begin to appear elsewhere, all signed with the mysterious pseudonym "Raven," and everyone in town starts to suspect everyone else of being the writer. One letter informs a shell-shocked veteran that he is dying of cancer, causing the distraught man to commit suicide. Suspicion falls on a nurse, who is imprisoned, but the letters continue to be delivered, one falling out of the choir loft while everyone is at church. Boyer assumes control of the investigation and analyzes the handwriting of every...