双叶幼儿园的游园会快到了，往年都会在游园会里跳春日部舞，但今年松阪老师却突然提议要跳森巴，不过马上受到吉永老师和上尾老师的大力反对，最终也只好不了了之。奇怪的是，第二天在幼儿园里，吉永老师却不同前一晚的态度，大力向园长建议游园会上应该跳热情的森巴……
游船遇风暴沉没，陆霆、女友陈清、李娜、陈清闺蜜马樱漂至荒岛。众人遭巨蟒袭击，得探险者遗物求生。马樱因妒生事，后联合落难驾驶员王强，王强却被巨蟒吞噬，马樱悔悟坦白。巨蟒擄走陈清，众人设伏，马樱与巨蟒同归于尽。数月后，陆霆、李娜乘直升机获救。
汪家大宅每一位当上大太太的女人都会在子夜12点离奇自杀，新进门的太太秀清嗅到了事情的蹊跷，展开了调查，并发现几位太太可能是被人所害。最终，秀清也当上了汪家大太太，陷入危机，而真凶也浮出水面。然而，真凶却是出乎意料的。 福寿堂棺材铺的汪老太爷去世，汪老爷为父亲赶制棺材，因规矩太阳下山必须收工，而汪老爷决定破例加班，导致招来了不干净的东西。当夜，汪家大宅堆满了花圈和棺材，大钟敲响12下，此时汪家大太太凝香却因为某种原因哭闹着要自寻短见。下人认为是老太爷召唤大太太，而汪老爷则认为是自己破了规矩，招来了煞气。第二天深夜，大家发现大太太自杀身亡，吊死在房间里，钟表正好指向12点。之后，二太太月娥和三太太桂荣相继自杀，时间都是深夜12点，加深了人们对于子夜招魂的信念。然而，四太太秀清因为留过洋见多识广，对于这种超自然说法并不相信。她认为只有亲身经历才能弄清事情的真相，于是决定成为汪家的下一任大太太。
Based on the novel by Karel Capek, the prominent Czech writer of the early 20th century who coined the word robot for his play R.U.R., the story revolves around a discovery of Krakatit - a powerful explosive - by Prokop, an experimental scientist who, following an accidental explosion in his lab, slips in and out of delirium. When he realises that, in a delirious period, he has given the formula for making Krakatit to one of his colleagues, he tries to find the man, who does not realize how dangerous a thing Krakatit is. In the process, he nearly gives his discovery away again to foreign interests, a group of anarchists, and even greater forces of darkness...
