该剧改编自横关大的小说，主人公是从性格、价值观到办案方针都截然不同的两名同父异母的刑警，他们将面对在池袋发生的凶恶案件。
Season 5 finds Murder, She Wrote's intrepid Jessica Fletcher in fine sleuthing form, and venturing farther afield from Cabot Cove--a good thing, since at the rate the murders have been happening, that town would be nearly cleaned out. Some of the best episodes take place in more exotic locales like New York (dead man on the street, wearing just one shoe), Montana (a publishing convention gone horribly wrong) and West Virginia (two whistle-blowers at a coal company found gruesomely murdered). Angela Lansbury sparkles with determination and bonhomie, hitting her stride and then some. Jessica's own life backstory is even filled out tantalizingly, especially in the episode "The Last Flight of the Dixie Damsel," in which an investigation is launched into a mysterious cargo plane that is linked, she learns to her horror, to her late husband. The series' other delight is watching for cameos by stars of a certain age, and this season doesn't disappoint, with appearances by Roddy McDowall, Shelley Fabares, and Dinah Shore--but also some up-and-comers like Megan Mullally (proof positive that the Will & Grace whine was a put-on) and future satirist Bill Maher.
江木塔子（松岛菜菜子饰）是一位历次结婚对象皆猝死的高校教师，为了追查真相保险公司调查员英器（竹野内丰饰）因而结识了这个神秘女子，发现她的未婚夫总是在结婚前以她为受益人买下巨额保险，而在结婚前3天解除，之后意外死亡。更发现她十五岁的时候父母在家中自焚，为她取得大量的保险金，让她接受教育活至成年。这个谜一般的女子，让英器陷入了悬疑的剧情及若有似无的恋情中。
分宁才子黄庭坚进京赶考，汴京城外遇布衣打扮的王安石夫妇遭人刺杀，幸突然出现的神秘女子兰溪和其弟信中奋力相救。新皇宋神宗闻悉震怒，责令御史赵挺之查办，赵挺之诬陷是兰溪信中所为，黄庭坚与好友秦观、米芾愤愤难平，设计相救。赵挺之怀恨于心，和对黄庭坚许亲不成的权臣蒋子奇相互勾结，拒黄庭坚于考场之外。在欧阳修的关照下，黄庭坚得以假名入试，一举高中，为他鸣不平的秦观却意外落榜，原来这一切竟都是为苏小妹而起。
二十年代初，徽商后代朱春华在新婚之夜遭匪劫，父母双亡。撇下新娘匆匆随伯父去扬州经营快破产的盐号，凭智慧和诚信，在扬州打下了一片新天地。不久，他发现未来得及圆房的妻子知莲竟生下一子（后名高朱朱），愤怒离去。原来知莲是被他的堂弟朱冬华用蒙汗药强暴得手。痛苦中朱春华与一直爱着他的日本女孩加代发生了关系。加代生一子，受父亲威胁分享者电视网addintime.com，不得已将儿子朱源托知莲抚养。抗战爆发后，朱春华组织商会与日本侵略者、汉奸展开殊死的斗争，并冒生命危险为新四军秘密运送食盐。为此，亲人付出了巨大的牺牲。期间，知莲将两个身世不同的儿子送到他身边。这个乱世家族两代人展现了其大义凛然和抗日斗志。晚年的朱春华告别了长于斯梦于斯的扬州，回老家安度晚年。
方箏搭上姜智騫的組合，屢建奇功，拿下樁樁刑事重案；同時，趙立廷私下調查的頂冠弊案，成了死亡導火線，在方箏決定重新接納立廷的這天，一場意外，讓方箏婉拒外界的關心，芝綺和智騫一同扛下方箏的業務，也決定聯手對付現任主持律師余照新，余家內鬥愈見激烈。 方箏回歸後，她決定不再死守道德底線，她要主動出擊要找出真正的兇手，復仇戲碼隨著一樁礦場開發案揭開序幕，隨之而來的是牽連政法商三界的行賄筆記本醜聞，最終恩怨全在一把復仇火焰點燃之後，熊熊燃燒。
