故事发生在法国和比利时的边界，鲁本（贝诺特·波尔沃尔德 Benoît Poelvoorde 饰）和马塞尔斯（丹尼·伯恩 Dany Boon 饰）是分别隶属于比利时和法国的海关边境检查员。个性刚烈又倔强的鲁本是个坚定的民族主义者，他对关于法国的一切嗤之以鼻，其中当然包括法国人马塞尔斯，而他并不知道的是，马塞尔斯和自己的妹妹露易丝（Julie Bernard 饰）之间产生了真挚的感情。

Astrid Nielsen, works in the library of the judicial police. Suffering from Asperger's syndrome, however, she has an incredible memory, so she is very useful in analyzing the files for ongoing investigations. The district commander, having noticed this ability, decides to use it to the fullest, entrusting her with very complex investigations which have remained unsolved to date. In addition, also to reciprocate, he will try to help Astrid on the behavioral side, in order to provide mutual help.

根据《惊声尖叫》系列电影改编，残忍谋杀案后引起的网络讨论唤起人们对过去杀人狂魔的记忆，引起某些人的好奇，也启发了新的杀人犯。两个老朋友和一群年轻人为此重新联系起来，他们互相成为恋人、敌人、冷血杀手嫌疑人、目标和幸存者。