We follow David as he explains to police how he woke up in a deathtrap and was forced to kill a man to release himself from the deadly contraption.

Adam Stanheight and Dr. Lawrence Gordon wake up chained to opposite sides of a bathroom with two hacksaws and a dead body on the floor between them. They find cassette tapes which give conflicting instructions: Lawrence must kill Adam before 6 o'clock or his wife and daughter are killed, and Adam must avoid being killed.

Near the end of the film, Dr. Gordon hears his wife and daughter screaming via cell phone and he believes they're being attacked. We see Dr. Gordon saw off his own damn foot and crawl out of the room, telling Adam he will come back for him.

Although the movie begins in the bathroom, we don't see the epic sawing scene until after all this other stuff:

Flashback to Paul's trap. He wakes up naked in a room surrounded by razor wire. As a punishment for self-injury (yikes), he must crawl through the razor wire to escape. He gets tangled in the wire and bleeds out.

Flashback to Mark's trap. He wakes up naked and covered in flammable jelly. The floor is covered with shards of glass. A tape tells Mark there is a slow-acting poison in his veins, and instructs him to use a small candle to read the numbers on the wall. One of these sets of numbers is the combination to a safe with the key to his freedom. Mark fails and burns to death.

Flashback to Amanda Young's trap. She wakes up strapped to a chair with a device around her head and mouth. A videotape tells her that she has 60 seconds to cut the key to her freedom out of the stomach of the dead man on the floor.

She gets out of the restrains, starting the timer, and stabs the man open with a conveniently-provided knife. Turns out, dude wasn't dead but just numbed from an opiate overdose. She unlocks the Reverse Bear Trap with seconds to spare and survives with some scars around her mouth. Yay Amanda!

While searching for the Jigsaw killer himself, police detectives David Tapp and Steven Sing find a man named Jeff in the Drill Chair. He has 20 seconds to get out before two power drills on either side of him kill him. They save him.

While exploring Jigsaw's lair, Detective Sing is killed by four tripwire-activated shotguns.

It's finally revealed that the man we think is Jigsaw, Zep Hindle, is actually also a victim being tested. A Jigsaw tape informs Zep there is a slow-acting poison in his veins (man Jigsaw sure loves those) and Zep must abduct Dr. Gordon's wife and daughter and kill them if Dr. Gordon fails to kill Adam by 6 o'clock. Zep's reward would have been the antidote. Zep enters the Bathroom Trap and is killed by Adam with a toilet tank lid. Lol.

Police informant Michael Marks wakes up with a contraption around his neck and torso. The key to remove it has been surgically placed under/behind his eye. He must cut the key out or die. He fails to get the key, and the Venus Fly Trap snaps closed around his head and he dies.

SWAT officers show up at Jigsaw's hideout, but one of the stair steps is booby trapped. An officer's legs are broken and the metal cage around the stairs is electrified. Detective Eric Matthews and other officers find Jigsaw as well as a room of CCTV monitors of a Game being played somewhere.

On the monitors they watch seven formerally incarcerated people, plus Eric's son Daniel, wake up in the Nerve Gas House (Amanda, Obi, Gus, Jonas, Addison, Laura, Xavier, and Daniel).

They have two hours to solve some puzzles / traps around the house for antidote syringes before the poison kills them. Jigsaw tells Eric all he has to do is wait for the full two hours to be up to see his son again. Eric doesn't believe him, and continues to interrogate him in more "enhanced" ways as he gets impatient with Jigsaw's non-answers.

Within the room the victims all wake up in is a safe containging an antidote syringe. One of the numbers of the complete combination was written on the back of each person's neck, which they could have cooperated to uncover. Oops.

They're instructed not to use a key on the door to get out of the room. Gus does it anyway, and a revolver shoots him in the head through the peephole.

Obi crawls into a furnace to get an antidote syringes. He fails to pull some lever in the furnace and is burned alive along with the antidote.

This trap was intended for Xavier, but as the biggest dude in the group he throws Amanda into the needle pit instead. She finds the key but Xavier does not unlock the door to the antidote in time.

Addison finds a room with a suspended glass box containing another antidote syringe. She puts her hand in one of the holes, then realizes it has one-way razors, panics, and puts her other hand in the other hole. The antidote syringe gets spilled in the glass box during her panic. She bleeds out.

Throughout the movie, Detective Eric Matthews is pressing John Kramer (Jigsaw) to reveal the location of the Nerve Gas House. His own son is trapped there with people Eric unjustly arrested and planted evidence on. Eric's test was to simply wait the full two hours. The police tech team discovers the footage on the monitors is not live, but pre-recorded. Eric's son was in the safe behind the desk the entire time.

Troy wakes up in a classroom with chains and metal rings through various parts of his body (lower jaw, achilles heels, arms, back, etc., it's pretty nasty).

A tape instructs him to rip the chains off before the timer runs out and a nail bomb explodes. He tries his fucking best but fails to remove all the metal rings and the bomb explodes. Detectives later notice the door was welded shut, meaning Troy wouldn't have been able to leave even if he "passed" the test.

Detective Allison Kerry wakes up in a trap. She is suspended by chains with a device hooked into each of her ribs. A tape intructs her to reach into a suspended jar of acid for the key to her freedom. She dunks her hand in the corrosive liquid, gets severely burned, and retrieves the key. Unlocking the trap does nothing. Her ribcage is torn open like "angel wings".

Dr. Lynn Denlon is abducted from the hospital she works at and wakes up restrained to a wheelchair in Jigsaw's workshop. Amanda Young, Jigsaw's apprentice, puts a shotgun shell collar around Lynn's neck (yeah, this is the lesbians part).

Dr. Denlon must keep Jigsaw alive. He's sick and dying in a hospital bed. If his heart monitor flatlines, her collar will go off and blow her head off. Same result if she tries to leave the area.

Jeff is struggling with the death of his son by a drunk driver. The grief has caused him to ignore his wife and living daughter. Soooo Jeff is now going to endure a Trial.

The following Traps are part of Jeff's Trial, in which he must decide whether to endure pain to save the people involved in his son's death, or let them die.

The first trap in Jeff's Trial tests his forgiveness of a woman who witnessed his son's death and fled the scene. She was the only other witness. No idea how Jigsaw knew who she was, but anyways.

She is hanging by her wrists in a meat freezer room, with jets that periodically spray her with water. The water instantly freeze-burns her skin every time it deploys.

Jeff must reach between some frozen metal pipes to retrieve the key to save her. After some yelling at her, he decides to go for the key, burning his face on a frozen pipe in the process. He gets the key, but it's too late. Her wrist lock is covered in too much ice.

The second trap in Jeff's Trial tests his forgiveness of the judge who only sentenced the drunk driver to six months in jail.

Judge Halden is shackled by the neck to the bottom of a giant vat. As time goes on, a cieling conveyer drops rotting pig carcasses into a giant blender, which dumps the pig smoothie into the vat.

The key to the Judge's collar is hidden among Jeff's dead son's possessions. Jeff has to choose to burn his son's toys and things to get the key, or keep the mementos and let the Judge die.

After some arguing he chooses to burn his son's possessions and frees the Judge. They continue together to the next room.

The final trap in Jeff's Trial tests his forgiveness of the drunk driver himself.

His son's killer, a medical student named Timothy, is held arms-out Jesus-style by a contraption. The Rack also goes around his head. A tape informs them that this device will twist his arms, legs, and head, unless Jeff saves him.

To save Timothy, Jeff would have to reach into a glass box and pull on a key on a string. The string is connected to a shotgun trigger, forcing Jeff to take a bullet for Timothy.

After some more arguing between the three of them, Jeff decides to go for the key. Somehow it shoots the Judge instead. Jeff panics and fails to unlock the Rack in time. Timothy's limbs and head are all twisted completely around, killing him.

So this last part is not a trap but still the final part of Jeff's test. It makes a little more sense if you watch the film but I'll do my best to explain what happens.

Jeff enters the final room, the same one where Jigsaw is laying in the hospital bed under Dr. Denlon's care. Moments before he enters, Amanda shoots Lynn out of jealousy. Oh snap, Lynn was Jeff's wife the whole time!

Jeff shoots Amanda in the neck with a gun he was provided in the hallway.

Jeff confronts Jigsaw/John, while a dying Lynn begs him not to kill John. Shes trying to explain that her shotgun collar will go off if John dies. Jeff doesn't listen and continues arguing with Jigsaw.

Jigsaw explains this is the final test: to forgive him for the whole ordeal, and by doing so, save his wife and daughter (daughter has been hidden somewhere the whole time). Or, Jeff could keep seeking revenge, and kill Jigsaw with any of the tools lying around. Jeff chooses to slice Jigsaw's neck with a nearby circular saw.

Jigsaw dies, Lynn's collar goes off and blows her head off.

Two guys wake up in a mausoleum. They're both chained by the neck to a winch in the center of the room. One of them has his eyes sewn shut (Trevor), and other's mouth is sewn shut (Art Blank). Weapons are placed on the blind guy's side of the room.

The winch activates and starts spinning, pulling the men's chains and bringing them closer. The blinded man thinks the other guy trapped him there, and the mute man can't explain anything. They fight. The key to escape is attached to the back of the blinded man's neck shackle.

Art manages to get the hammer and kills Trevor with it. Art wins the game.

Probably the most bizarre Trial of the entire series - Officer Daniel Rigg is free to travel between different locations for each part of his test. I guess we are to belive he is so obsessed with the Jigsaw case, he is willing to do these things without calling for backup or telling anyone where he is.

Unlike Jeff's Trial of forgiveness in the previous film, the theme of Rigg's Trial is to not save people. They must save themselves, and his interference is what kills them.

I think this "save by not saving" aspect of Rigg's Trial is a fresh, interesting perspecting to explore in the Saw universe.

Officer Rigg's first test is a trap he finds in his own house. He finds a pig-masked, seated figure and pulls the mask off. The person underneath is confined to a seat, hair held back by a machine. This is Brenda, a sex trafficker. Photo evidence of her crimes is posted all around the room for Rigg to see.

Rigg is instructed to not interfere. He decides to interfere. By pulling the fabric off of her, the machine under her seat is activated.

Her hair is pulled into the machine as the gears spin. Rigg has to find the combination to free her - the numbers are written on the gears, so he has to watch them turn to get the full lock combination.

She is almost completely scalped by the machine when Rigg finally frees her. Oh shit! She starts trying to kill him.

Before Rigg entered the room, Brenda was told via Jigsaw tape that an officer would try to free her, and if he did, he would put her away for her crimes with the evidence posted around the room. Rigg accidentally kills her while fighting her off.

Movie starts with a guy restrained flat on his back in a trap. This is Seth Baxter, a man covered in racist tattoos. A Jigsaw tape informs him that the giant pendulum blade above him will slowly drop and cut him in half unless he sacrifices his hands by pressing two buttons within vises.

He freaks out, decides to press the buttons, his hands get crushed by the vises... aaaand the pendulum slices him in half anyways!

Special Agent Peter Strahm wakes up with his head in a glass cube. Water starts to fill the cube until his head is completely submerged.

There's no cassette tape with information, no game, no way out. This trap was intended to kill Strahm.

But whoever trapped him forgot to take away his pen! Strahm disassembles the pen and uses the hollow metal tube to give himself a tracheotomy. He lives and is found by medics.

Don't try this one at home, kids!

Five people wake up in a group Saw trap.

Predatory lenders Simone and Eddie wake up in the Pound of Flesh trap. They have devices around their foreheads and a caged weigh scale in the center of the room. Whoever provides more "pounds of flesh" and tips the scale in their favor before time runs out survives. Although Eddie had more belly fat to lop off, Simone chops off her own arm and wins at the last second. Eddie's temples are crushed by his head device.

Umbrella Healthcare VP William Easton wakes up in his first trap alongside Hank, the company janitor. They are both restrained by the hands and feet, with oxygen masks on and devices around their torsos. Every time they breathe, their ribcage is crushed a little further. Whoever can breathe the least wins. Hank, an older smoker, fails the test. William survives and continues to the next test.

William finds a room with two handles he must grab and pull. When he does, the lights come on, revealing two people he knows behind the glass. Addy and Allen are each standing on a small ledge with razor wire nooses. William must let go of one handle, sacrificing one of them and saving the other. The longer he takes to decide, the harder the handles pull apart on his arms. He eventually chooses to save Addy. Allen's ledge drops out from under him and his body swings forward and slams on the glass in front of William's face. It's pretty rough.

William, on the second floor, must guide his lawyer Debbie through a chainlink fence maze on the first floor. There is a bolt gun (like the ones used for killing cattle) strapped to her chest, aiming up at her head. Her path through the maze is blocked with jets of hot steam, which William can choose to divert away from her with levers that blast him with the steam instead.

They both get steamed like potatoes but she makes it to the end of the maze, where it is revealed that the key to remove her device is sewn into William's abdomen. There is a conveniently-placed cordless circular saw on Debbie's side of the Maze. She grabs it, opens the unlocked gate, and starts attacking William. They fight, her timer runs out, she is cattle bolted through the head.

William hears screaming and arguing behind large doors. In the room he finds his six prized employees, the so-called "dog pit", so named because they find discrepancies in customers' insurance claims, leading to 2/3 of claims getting denied, saving the company millions of dollars a year, and costing customer lives.

All six of them are chained to a caged merry-go-round with a shotgun mechanism pointed at it. William must choose which two of the six to spare, by pressing two buttons inside the machine while his hand is stabbed. If he doesn't choose, they'll all be shot. They all scream and argue about which of them deserve to live. William ends up sparing two of the women, everyone else is shot.

The entire time, Easton's Trial has been watched on a CCTV monnitor by the wife and son of a man who died due to insurance claim denial. This wife and son were also Jigsaw abductees and simply woke up in the room with the monitor.

In another cage on the opposite side of the room is Easton's sister, Pamela, a reporter on the Jigsaw case.

Easton enters the room between these two cages, and it's revealed that the deceased's wife and son must now decide if Easton's actions throughout his trial make him worthy of being spared.

They decide he still deserves to die, and the son pulls the lever. A panel of dozens of needles swings down and impales Easton against the fence wall. He is injected with hydrofluoric acid and dissolves in a gorey mess while Pamela screams.

Elsewhere, Jill Tuck is able to restrain Hoffman and fit him with the Reverse Bear Trap 2.0.

Hoffman survives by using metal bars into the window to prevent the trap from snapping completely open. He pulls the trap off his head, ripping the side of his mouth in the process, and survives.

A random girl and two guys she's cheating on are trapped in a public glass box, the two men must decide whether to push the saw to kill the other man, or cooperate and allow the saw to kill the girl. They decide to kill her. We watch her get rotary sawed in half.

Jill has a dream about Hoffman killing her by tying her over some tracks while a spiked "train" flies toward her and rips her apart.

At a junkyard, various skinheads are bound in various places around a car. The car is propped up on jacks and constantly accelerating. The man glued to the driver's seat, Evan (played by Chester Bennington of Linkin Park, Rest in Peace), must rip his own skin off to pull a lever out of reach to stop the trap.

He fails, and the revved up car drops from its jacks and kills everyone. His girlfriend is crushed under a tire, a man chained through the face behind the car is ripped apart, and another man tied to the garage door in front of the car is killed. Evan himself flies through the windshield and dies. Some people speculate that the lever would not have stopped the trap, as a dead body at this scene was necessary for Hoffman's plan.

Bobby Dagen lies about surviving a Jigsaw trap and makes tons of money selling books and doing public appearances. He starts attending Jigsaw Survivor Support Group meetings, with a camera crew and entourage.

During a meeting, a woman shares how she survived the Lawnmower Trap by getting her abusive husband to fail and fall into the spinning blades.

After this meeting, Bobby is abducted and put through a Trial, whereby he must suffer to save the people associated with his lies: his friend who helped create the scheme, his publicist, his lawyer, and ultimately his wife, who was the only person unaware that Bobby lied.

Bobby's Trial starts with freeing himself from the Suspended Cage, kind of a lame and simple trap. He makes it swing and jumps out, avoiding the spikes below.

Bobby's publicist Nina is straigh-jacketed in the center of four metal spikes. He has 60 seconds to pull the key to her freedom tied to a fishing hook in her stomach, via a long string hanging out of her mouth. If they make any noise above a few decibels, the spikes get closer to her neck.

He gets the hook-key-string out, but doesnt unlock her in time. She is visciously impaled.

Bobby's lawyer Suzanne is strapped flat to a board that will rotate her face toward three metal spikes. Bobby has to lift another machine and hold it in place while it stabs his sides, to delay her rotation toward the spikes. He fails. She is brutally impaled in the eyes and mouth.

Bobby's friend Cale is on the other end of a hallway with no floor, just wooden planks arranged like a bridge. Cale has some BDSM type gear around his head and neck, covering his eyes and attaching him to the ceiling. Bobby must verbally guide him on where to step. Bobby find the key to Cale's headgear and tries throwing it to Cale. He fumbles the catch, the timer runs out, and Cale is winched to the ceiling and hanged. Not very graphic.

Bobby has to rip out his own teeth to get the combination to a door. He succeeds.

Bobby must survive the same trap he claimed to survive in his book - putting metal hooks through his own pectoral muscles and hoisting himself to the cieling with a chain pulley. But there is a new factor: his wife Joyce is chained to the floor of a platform across the room, behind an electric fence. He must connect two cieling cables to save her.

He almost succeeds, but the hooks rip through him while hes is trying to connect the cables, and he falls to the ground. Joyce's platform transforms and she is encapsulated in a Brazen Bull. We get to watch her burn alive. Yikes!

Back to the detective drama side of things: some cops were investigating Hoffman's suspected workshop or something, and a giant gun pops up and mows them all down.

SWAT officers get close to Bobby's trial location but are sealed in a room with cyanide gas. They all die.

Hoffman hides in a body bag from the Horsepower Trap scene to infiltrate the police station. He takes down everyone at the station where Jill is being held for her own protection. He finds her. Although she stabs him in the neck with a nail file, he is able to strap her to a chair and put the Reverse Beartrap (1.0, same one as the first film) on her head. It's the first time in the series that we see what actually happens to someone who fails the RBT; her face/head is brutally ripped open.

Cop (Boz) gets trapped by the tongue and must rip it out to avoid being hit by a train. He fails. Gets splattered by the train. He was put in the trap for repeatedly lying in court.

Cop (Fitch) gets trapped in a water tank with each of his fingers wrapped in metal. If he doesn't get out in time, the water will be electrified. He has to bite down to close the circuit via some headgear, which turns on a machine to rip off his fingers. He almost rips them all off but runs out of time and is electrocuted in the water. He was sawtrapped for killing a witness who would have testified against a fellow cop.

Police Captain (Angie) wakes up strapped to a table with some cheesecloth over her face. Her choices are to get her face covered in hot wax, or sever her spine with the blade under her neck to stop the flow of wax. Insane options. Die or die. Anyways, she dies. She was tested for being corrupt.

Officer Zeke Banks wakes up handcuffed to a pipe with a hacksaw nearby. Lol. Lmao, even.

But don't worry! There's actually a bobby pin nearby. So, he uses that to pick the handcuffs and free himself.

Oh wowww the new "Jigsaw" was actually Schenk, Zeke's new parter, the whooleee timeee. Wow what a twist. He has a childhood flashback to show he became a cop just to infiltrate the police force and get revenge. He's not intelligent like John, cunning and complex like Hoffman, or human like Amanda. He just doesn't come across as a good or interesting villain. It's very shoehorned.