故事发生在十二世纪的法国，一种神奇且危险的时光穿梭魔力药水令戈德弗鲁瓦骑士（让·雷诺 Jean Reno 饰）和其仆人拉弗里普伊（克里斯汀·克拉维尔 Christian Clavier 饰）一同穿越到了二十一世纪的美国芝加哥。翻天覆地的变化和车水马龙的大街让这两个“老古董”既好奇又恐惧，就在此时，一位名为茱莉亚（瓦莱丽·勒梅西埃 Pierre Aussedat 饰）的美丽女子出现在了两人的面前。巧合的是，这位茱莉亚不是别人，竟然就是戈德弗鲁瓦骑士的后代。
很快，戈德弗鲁瓦骑士和拉弗里普伊便明白了他们的处境，与此同时，一个严重的问题浮出了水面——如果他们无法返回属于自己的时代，那也就意味着，他们的后代，也就是茱莉亚也将不复存在。十万火急之下，戈德弗鲁瓦骑士一行人开始寻找起了回到过去的方法。
DS Mackenzie Clarke (Anna Samson) is back, fresh from having wrecked another of Glenn’s (Tai Hara) weddings and determined never to follow her heart again.
But ignoring her heart won’t be easy. The arrival of her force-of-nature mother Jillian (Kerry Armstrong) puts Mack's mettle to the ultimate test and there's something undeniable about the raffish charm of the new pathologist Leo (Jacob Collins-Levy). And as for Glenn, who has gone away to ‘find himself’, well that's a whole other puzzle for Mack to try and solve ...
And, while Dolphin Cove may still look like paradise, it continues to serve up a steady stream of baffling murder mysteries – from the artist stabbed in full view of the public, to the wildlife worker dead in a locked cassowary cage. Mack will solve it all with her usual brilliance, and the off-beat help of her loyal team.
