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 doesn't 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.
老鸟警探(塞缪尔·杰克逊 Samuel L. Jackson 饰)带领警探(克里斯·洛克 Chris Rock 饰)调查惨绝人寰的连环杀警案,“拼图杀人魔”重出江湖的传言,再度勾起所有人心中的恐惧。这次新的游戏规则,似乎直冲警察而来。每个命案现场留下的“死亡漩涡”,将把他们卷进难以抽身的血腥深渊之中…… 《电锯惊魂》第九部由第8部的两位编剧皮特·古德芬格和乔什·斯托伯格撰写剧本。执导了《电锯惊魂234》的达伦·林恩·鲍斯曼此番回归执导。