BBC Adaption of Agatha Christie's novel; in the small village of St. Mary Mead, Colonel and Mrs. Bantry, owners of the local manor Gossington Hall, are shocked when a young lady's body is found in their library. They call in the police who soon run up against a brick wall; only finding out that the body is that of a dancer in London who the Bantrys didn't even know. But how and why was her body left in the library? To find out the truth, the Bantrys call in the help of their good friend Miss Jane Marple.