Nina O'Brien's life is changed forever when a stranger appears at the door to her father's truck stop, bloodied and incoherent. As night falls and a ferocious storm descends on the tiny Californian community, the small group of people sheltering with Nina steel themselves to face the onslaught, only to be confronted by a ruthless killer. With nowhere to run, and no means to raise the alarm, Nina must decide who to trust if she is to survive the night.