扎克斯（威廉姆斯•艾什 Williams Ash）与女友贝丝（克莉丝汀•波顿莱 Christine Bottomley 饰）雨夜驱车在M1高速路的不同加油站张贴海报。二人因意见不合而激烈争执，差点被一辆白色卡车撞到。扎克斯恍然看见卡车后箱里有女子被缚求救。报警后扎克斯继续驱车前行，贝丝却因为扎克斯没有继续跟进卡车试图救人而不满，二人争吵升级。贝丝在某加油站终向扎克斯提出分手，扎克斯本想挽回，却遍寻贝丝不见。惊慌的扎克斯怀疑贝丝被那辆白色卡车绑架，但加油站巡警却将信将疑。为了追回女友，扎克斯只好只身赴险。雨夜、绑架、荒野、凶手，等待扎克斯的究竟是什么？Tired and irritable, Zakes Abbott drives home along the motorway, his girlfriend, Beth, asleep beside him. Failing to spot his exit he speeds across the causeway, cutting up a white van and barely avoiding an accident. Apoplectic with rage, the truck driver gives chase, and as he violently overtakes the tailgate flips up revealing a woman bound and bloodied in the back. But before there is time for a second look, the door is slammed shut and Zakes is left bewildered and wondering if what he saw was real. Later at a service station, Zakes' fears grow when Beth goes missing, and as he begins a frantic search, he is enticed into a deadly game of cat and mouse on the deserted motorway. But being the sole witness to the earlier scene, how does he convince others of his desperate need for help? Playing on our most primal fears, this taut suspense thriller challenges a world where we constantly turn responsibility over to someone else and asks the question: what do you do when there is no one else there?