- Directors: Darren Lynn Bousman
- Producers: Mark Burg, Oren Koules
- Writers: Screenplay, Patrick Melton, Marcus Dunstan, Story, Thomas Fenton, Patrick Melton, Marcus Dunstan
- Genres: Crime, Horror, Thriller
- Actors: Tobin Bell, Costas Mandylor, Scott Patterson, Lyriq Bent, Betsy Russell, Justin Louis, Donnie Wahlberg, Athena Karkanis, Angus Macfadyen
During John Kramer’s autopsy, a wax-coated microcassette is found in his stomach. Lieutenant Mark Hoffman arrives at the morgue and listens to the tape, which informs Hoffman that he, too, will be tested and that even though Jigsaw is dead, the games have just begun. Elsewhere, a game is taking place in a mausoleum, where Trevor and Art are chained to a large winch. Trevor’s eyelids have been sewn together, as has Art’s mouth, making communication between them impossible. When the winch begins pulling them together, Trevor attacks Art out of panic; Art kills him to retrieve a key from Trevor’s collar and free himself. It is later discovered that he finds a video and instructions in another part of the building.
Six months have passed since Detective Eric Matthews’ disappearance, and four days since Detective Allison Kerry’s, as noted by Hoffman. The police discover Kerry’s corpse, still hanging in the harness of the inescapable trap that killed her in Saw III. After cautioning Lieutenant Daniel Rigg for barging through an unsecured door, Hoffman is introduced to FBI Agents Strahm and Perez, who deduce that Amanda Young, Jigsaw’s apprentice, would need assistance with Kerry’s trap, indicating that there is another accomplice to the murder.
Matthews sees Rigg approaching and tries to warn him off, ultimately shooting him with Art’s provided gun; though badly wounded, Rigg crashes through the door with one second left on the clock. Rigg shoots Art as the ice blocks are released and crush Matthews’ head, killing him instantly. Art tries to explain the situation to Rigg while pulling out a tape recorder; Rigg mistakes it for a gun and kills him. The message relays Rigg’s failure to complete the task, revealing that by not letting go of his obsession with saving people, he brought about the deaths of the captives. An unharmed Hoffman releases himself from the chair, revealing himself as Jigsaw’s second apprentice, and leaves Rigg to die. Meanwhile, Strahm finds Jeff in the makeshift sickroom from Saw III. Jeff demands to know his daughter’s location, waving a gun at Strahm; he kills him in self-defense, fulfilling Jigsaw’s prediction. He is then locked in the room with the four corpses by Hoffman. As he walks out of the factory, the scene cuts to Jigsaw’s autopsy, revealing that it took place after the events of Saw IV.