陈珊（高圆圆?饰）因不满丈夫孙磊（张鲁一?饰）所在工作单位对其的不合理判罚，擅自替孙磊辞职，却引得丈夫不满，一怒之下提出离婚。A group of young men dare a classmate to reach the porch of a legendary old house, said to be haunted by the thirteen victims of a family massacre. In hopes of making a viral video they arm him with a video camera to prove he was there or to capture him fleeing in terror before even reaching the house, as others have. When he doesnt return, the guys must go in to get him. Inside they discover the truth about the house, the fate of their friend and their own fate as well.