Two men wake up at opposite sides of a dirty, disused bathroom, chained by
their ankles to pipes. Between them lies a dead man loosely clutching a
hand-held tape player and a handgun. Each finds a tape the perfect fit for
the player in their back pocket. They play the tapes. One is threatened,
the other isn't. But they have a task: One must kill the other by 6:00, or
his wife and daughter will die. They find hacksaws in a toilet, and try to
cut the chains, but it doesn't work. They are the two newest victims of the
Jigsaw Killer. In a flashback, we learn of Amanda, a girl who falls victim
to the Jigsaw Killer. On her head is a mask, which is hooked into her lower
jaw. There is a timer on it. Only one key will unlock it, and that key is
in the digestive tract of her cell mate who lies paralyzed on the opposite
side of the room. If she doesn't unlock the mask in time, her lower jaw
will be ripped wide open. She survives, but her cell mate doesn't. Through
a series of flashbacks, we learn of more victims, and of the
nearly-successful capture of the Jigsaw Killer, who doesn't actually kill
his victims. Instead, he finds ways to make them kill either themselves, or
each other, and he thinks the entire 'game' out perfectly, with no other
ways out. Or so it would seem.
Adam en Dr. Lawrence Gordon worden wakker, om erachter te komen dat ze vast
zijn geketend aan pijpen tegenover elkaar in een vieze badkamer. Ze
ontdekken dat ze slachtoffers zijn geworden van "Jigsaw", een man die
gevaarlijke situaties voorziet om zijn slachtoffers te leren hun leven lief
te hebben, door hen te dwingen zichzelf of anderen te pijnigen om in leven
te blijven. Jigsaw staat bekend als moordenaar, maar heeft nog nooit een
slachtoffer echt zelf pijn gedaan. In een strijd tegen elkaar en de klok,
moeten de twee van hun vijand winnen en Gordon's familie redden, die zijn
gegijzeld door de 'moordenaar'. Zullen zij het redden?