Marple is asked by her lawyer, Christian Gilbranson, to visit his step-mother, Carrie Louise Serrocold, an old friend of Miss Marple's, at her country estate. Carrie's husband, Lewis, confides to Miss Marple that he suspects someone is slowly poisoning his wife, and when Gilbranson visits the mansion, he is mysteriously murdered.

故事发生在充满了异域风情的马来西亚，莱斯利（贝蒂·戴维斯 Bette Davis 饰）在那里和丈夫罗伯特（赫伯特·马歇尔 Herbert Marshall 饰）一起经营着一间橡胶种植园，日子过得十分安逸。某天，罗伯特外出公干，留下莱斯利一人看家，哪知道很快，便传来了噩耗，莱斯利开枪将一个名叫大卫的男人给打死了，而莱斯利坚称大卫想要袭击她，她开枪杀人纯属自卫。　　罗伯特相信了莱斯利所言，找到了律师霍华德（詹姆斯·斯蒂芬森 James Stephenson 饰）为妻子辩护，可是，让他们没有想到的是，大卫的妻子哈蒙德太太（盖尔·桑德加德 Gale Sondergaard 饰）手上握有莱斯利和大卫偷情的证据。

音乐教师Christine Radcliffe原以为 Karel Novak 在战争中被杀害，她是如此的爱他，一直坚持与他携手共老。可是当Karel 再次出现的时候，等来的却是来自他爱人的一颗子弹..

Reporter Curt Devlin loves sob sister Ellen Garfield but believes women are bum newspapermen. When she learns the identity of a murdered arsonist, he calls it luck. When she goes after the murderer he gets enough evidence to have Maitland Coulter arrested. She finds a bunch of not guilty ballots and publishes the wrong story; he eavesdrops on the jury and gets the correct verdict. After being fired she gets a confession from the real killer and gets Coulter released.

玛丽(贝蒂·戴维斯)在匪徒约翰尼的俱乐部帮忙经营生意，而她的一个“客户”被杀害，警察大卫(亨弗莱·鲍嘉)希望玛丽帮助警方破案，但她并没有合作，最后约翰尼被无罪释放。当玛丽的妹妹贝蒂被约翰尼手下的一个暴徒杀害后，她决定说出真相......