En pleine nuit, alors que la tempête fait rage, une jeune femme dans le besoin vient frapper à la porte du mobile home de Patrick, méfiant et solitaire. Il la laisse entrer. Intrigués et soupçonneux, tandis qu’ils apprennent à se connaître, ils se sentent menacés. Mais que doivent-ils vraiment craindre ? Patrick, a strange and lonely resident, lives in a mobile home at the back of an isolated caravan park. After a violent thunderstorm erupts, a mysterious young woman appears at his door, seeking shelter from the weather. The longer the night wears on and the more the young woman discovers about Patrick, the more difficult she finds it to leave. Soon she begins to question Patrick’s intentions, while Patrick begins to question his own grip on reality...