An
autopsy of the Jigsaw Killer reveals a wax-coated
microcassette in his stomach. Detective Mark Hoffman is called in to listen to it. The tape promises him that "the games have just begun." In a
mausoleum, a man named Trevor and lawyer Art Blank are chained to a large device. Trevor's eyes and Art's mouth have been sewn shut, making communication between them impossible. When the device begins pulling them together, they panic, and Art eventually kills Trevor to retrieve a key from his collar. Meanwhile, the police discover the remains of Detective Allison Kerry. Hoffman cautions Officer Daniel Rigg for barging through an unsecured door in attempt to save Kerry. Hoffman is introduced to FBI Agents Peter Strahm and Lindsey Perez, who deduce that
Amanda, Jigsaw's apprentice, would have needed assistance with Kerry's death, indicating that there is another apprentice. That evening, Rigg and Hoffman are kidnapped. Rigg is told that
Detective Eric Matthews is in fact still alive, and is given ninety minutes to save himself. He is then given his first test, where he finds sex trafficker Brenda strapped to a device that scalps her. He rescues her, despite being warned not to, and Brenda later attempts to stab Rigg; Rigg subdues her and learns that Brenda was told that Rigg was there to arrest her for her crimes. Strahm interrogates Jill Tuck, Jigsaw's ex-wife. Jill reveals that she was once pregnant with a boy named Gideon but suffered a
miscarriage when drug addict Cecil robbed the clinic at which she was employed and accidentally slammed a door into her stomach. Rigg's next test is at a motel, where he is instructed to abduct the manager, Ivan Landsness, revealed to be a serial rapist. Angered by seeing videos of Ivan's exploits, Rigg forces Ivan into a prearranged trap which forces him to gouge out his eyes; he fails to do it in time and the trap dismembers him. Rigg's next test occurs in a school where Rigg attacked Rex, a man acquitted of abusing his family, though Rigg's career was saved by Hoffman. In one of the classrooms, Rigg discovers Rex and his wife, Morgan, chained back to back with a spike impaled through their bodies. Morgan has removed every spike but one, killing Rex and leaving herself barely alive. Rigg removes the final spike and gives Morgan the key to free herself from her restraints, then pulls a fire alarm and leaves. Strahm and Perez arrive on the scene, where it is learned that all of the victims were defended by Art, who is also Jill's lawyer. After a photographer is accidentally killed on the scene, Perez finds
Billy, Jigsaw's puppet, in the office. She is told that Strahm will "soon take the life of an innocent man" and that Perez's "next step is critical". Ignoring past clues that she is in danger, Perez leans toward Billy and is critically injured by shrapnel when its face explodes. She is rushed to the hospital. After learning that he had terminal cancer, and after a
suicide attempt, Jigsaw placed Cecil in his first trap. After Cecil got out when the trap broke, he lunged at Jigsaw to attack him but fell to his death in a mesh of razor wire. Strahm makes connections from Jill's story to the Gideon Meat Factory, the scene of Rigg's final test. Strahm arrives but finds himself lost, accidentally trailing Jeff Denlon. Meanwhile, Rigg approaches his final test. In the next room are Art, Eric, and Hoffman; it was revealed earlier that if the door was opened before Rigg's timer expired, Eric's head would be crushed between two ice blocks and Hoffman would be electrocuted by a complex device. Rigg charges through the door with one second to spare. Despite Eric's attempts to stop Rigg by shooting him, he is killed. Rigg shoots Art while, in another room, Strahm encounters Jeff, who brandishes a gun. Strahm, who is unaware that Jeff is frantically searching for his daughter, kills him. Hoffman, who was never in any danger and is revealed to be Jigsaw's other apprentice, rises and seals a dying Rigg and a bewildered Strahm in the factory. These games are revealed to have taken place before Jigsaw's autopsy. Hoffman is warned via the microcassette that he can expect to face a test of his own. ==Cast==