夏日的法国乡间，Jack和Veronique一同结伴旅行。他们搭上了一辆便车，但随后发生的事让他们发现自己被卷入了一场事关生死的猫鼠游戏之中。一对神秘夫妻，一个公路杀手，Jack和Veronique将如何突出重围？

The recently widowed mother of two, Sarah, is desperate to know who murdered her husband in front of her young son, rendering him mute. Coerced into helping a low-life drug dealer stash narcotics stolen from the local Mr. Big, she's forced into taking drastic action to protect her children, evolving from downtrodden submissive to take-charge vigilante.