SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!
Dr. Lynn Denlon (Bahar Soomekh) becomes a pawn in the Jigsaw Killer’s (Tobin Bell) latest gory game. Kidnapped and taken to an abandoned warehouse, she finds Jigsaw bedridden and dying. Her task is to keep the maniac alive long enough for Jeff (Angus Macfadyen), a fellow victim, to complete his own task. Each is unaware that Jigsaw has much bigger – and deadlier – plans in store.
SPOILERS AHEAD
Saw III Plot Summary and Synopsis
After being left in the bathroom to die, Detective Eric Matthews breaks his foot with a toilet lid to escape his shackle. Six months later, the aftermath of a Jigsaw game is discovered by Officer Daniel Rigg’s SWAT team where the victim Troy had to rip chains from his body to escape a bomb. Detective Allison Kerry points out that the room’s exit was welded shut, breaking Jigsaw’s modus operandi of giving his victims a chance to survive. While reviewing the videotape, Kerry is abducted and awakens in a harness hooked into her ribs but despite being able to retrieve the key from a beaker of acid and unlock it, the trap inevitably kills her.
Dr. Lynn Denlon is abducted from the hospital she works at and brought to the bedridden John Kramer. His apprentice, Amanda Young, locks a collar armed with five shotgun shells around Lynn’s neck that is connected to John’s heart rate monitor and will detonate if she moves out of range or John dies. Lynn is instructed by Amanda to keep him alive until another test subject has completed his game; the victim Jeff, a grief-stricken father consumed with vengeance after the death of his son Dylan in a drunk driving accident, must undergo a series of tests around the abandoned meatpacking plant to confront those involved in the incident.
Jeff’s first test leads him into a meat freezer where he finds Danica Scott, the only witness to the accident, who refused to testify in court; she is stripped naked and chained inside a metal frame, which begins spraying her with ice-cold water. Jeff was able to retrieve the key after Danica persuades him to help her, but she freezes to death before he could do so.
In his next test, Judge Halden, who presided over the court trial of the accident, is chained at the neck to the bottom of a vat. Rotting pig carcasses are dropped into a grinder that slowly fills the pit, but Jeff saves him by burning away his son’s memorabilia in an incinerator to retrieve a key. His third test involves Timothy Young, the driver who accidentally killed Dylan, who is strapped to a machine that will twist his limbs and head. The key is tied to the trigger of an enclosed shotgun that goes off after Jeff retrieves it, accidentally killing Halden while the former fails to save Timothy in time when the machine brutally snaps his neck.
Lynn is forced to perform an improvised surgery to relieve pressure on John’s brain. The surgery is successful and Lynn eventually convinces John to order Amanda to remove the collar. However, Amanda refuses and threatens Lynn’s life, having become jealous of her interactions with John.
During their dispute, John pleads with Amanda, who admits that she no longer believes in his philosophy and had been manipulating her traps to intentionally kill their victims. Refusing to listen to John’s warnings, Amanda shoots Lynn just as Jeff arrives. The latter, who is revealed to be Lynn’s husband, retaliates by shooting Amanda with a gun provided by John after his tests. As Amanda dies, John reveals that Lynn’s test was actually hers: aware of her motives and unwilling to allow a murderer to continue his legacy, John decided to test her. He then addresses Jeff, offering to call an ambulance for Lynn if he had learned everything from his ordeal, and accept one last test: either killing John or forgiving him. In response, Jeff slashes John’s throat with a power saw, activating Lynn’s collar as the room is sealed shut.
Saw III Ending
Before dying, John takes out a tape recorder to inform Jeff that his daughter, Corbett was also captured and he must face another test to save her.
Source: Wikipedia (CC BY-SA 3.0).