Set in 1990, a lonely bachelor named David (Brian Landis Folkins) searches for an escape from the day-to-day drudgery of caring for his aging mother (Kathleen Brady). While seeking a partner through a video dating service, he discovers a strange VHS tape called Rent-A-Pal. Hosted by the charming and charismatic Andy (Wil Wheaton), the tape offers him much-needed company, compassion, and friendship. But, Andy's friendship comes at a cost, and David desperately struggles to afford the price of admission.
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。
