After the tragic deaths of her husband and daughter, Sarah Doyle moves back to her childhood home with her estranged brother, Richard. It's not long before Sarah begins to experience supernatural phenomena of a violent and hostile nature. Bewildered and desperate, Richard enlists the aid of a paranormal investigator who confirms that Sarah has become possessed by a powerful demon. Together, the three men will go to battle to save Sarah's soul.《盟约》是Robert Conway于2017 年在美国 导演，由Monica Engesser,Owen Conway,Clint James,Sanford Gibbons,Maria Olsen,Shawn Saavedra,Richard Lippert等出演,剧中使用英语对白,是一部恐怖片电影。