Build a movie plot around this: What does Rigg pull after giving Morgan the key? Fire alarm
During the autopsy of the Jigsaw Killer, John Kramer, a wax-coated microcassette is found in his stomach. Lieutenant Mark Hoffman is called in to listen to the tape, which informs Hoffman that he, too, will be tested as he is now "the last man standing."The scene shifts to 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, out of panic, attacks Art, who kills Trevor to retrieve a key from the latter's collar. In a later flashback, Art finds two items waiting for him elsewhere in the mausoleum: a recorded message from Jigsaw and an envelope containing instructions.It has been six months since the disappearance of Detective Eric Matthews, and four days since Detective Allison Kerry vanished, 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.That evening, Rigg is attacked in his home and Hoffman disappears. When Rigg comes to, a videotape informs him that Matthews is in fact still alive, with 90 minutes to save himself, and that Hoffman's survival is at stake as well. He then undergoes his first test, in which he finds a woman named Brenda. Jigsaw advises Rigg to walk away, and to "see what I see," as written on the wall, but Rigg's natural instinct to help those in need clouds his judgment. When Rigg removes the pig mask covering Brenda's face, he triggers a trap device that begins to slowly tear her scalp from her head. He succeeds in freeing her. To his surprise, she attacks him; Brenda has been told that Rigg is there to arrest her and the only way to stop him is to kill...