Four friends on vacation discover that their isolated rental property is already occupied by a seemingly friendly older couple. A night of unimaginable terror ensues…...

　　一对从费城到落基山脉度蜜月的夫妇因为吵架，妻子一怒之下开车离去，第二天丈夫到当地警局报案想找回失踪的妻子，就在警察也毫无头绪之际，一个自称他妻子的陌生女人竟出现在他面前。。。...