Although the evidence appears to be overwhelming in the strangulation murder of a blackmailer, Miss Marple's sole 'not guilty' vote han gs the jury 11-1. She becomes convinced that the real murderer is a member of a local theatrical troupe, so she joins them in order to gather information. The clues lead back many years to a single disastrously unsuccessful 1951 performance of a dreadful play written by the group's hammy director, H. Driffold Cosgood. Although at that time, several of the current cast members were only children, more murders follow before Miss Marple ultimately exposes the killer. 英國影片。片長90分，根據Mrs. McGinty's Dead改編，原著是波羅故事。因影片將主角變為馬普爾小姐和劇情的更改引起原小說作者克里斯蒂強烈不滿，影片本身也遭遇票房和評論慘敗。主演Margaret Rutherford還出演過另外3部以馬普爾小姐為主角的電影，其中1部亦是根據波洛故事改編(「葬禮之後」)，另1部是原創劇本。80年代在多部電視劇中扮演塔彭絲的Francesca Annis也在本片中扮演一個小角色。