Agatha Christie's classic sleuth, Miss Marple (Geraldine McEwan), takes on another case of murder most foul. After a serious motorcycle accident, the dashing Jerry Burton (James D'Arcy) arrives in the sleepy village of Lymstock with his sister Joanna (Emilia Fox) to recuperate. Their expectations of peace and quiet are quickly dashed when they discover a poison pen-writer is at large in the village. Together Miss Marple and Jerry set out to stop the malicious messages before they result in another tragedy. Little do they know that they will ultimately unveil a murderer.