John Kramer, the "Jigsaw Killer," traps victims in situations that test their will to live through physical or psychological torture. According to Jigsaw, if they survive, they will be "rehabilitated."
Two strangers awaken in a room with no recollection of how they got there, and soon discover they're pawns in a deadly game perpetrated by a notorious serial killer.
When a new murder victim is discovered with all the signs of Jigsaw's hand, Detective Eric Matthews begins a full investigation and apprehends Jigsaw with little effort. But for Jigsaw, getting caught is just another part of his plan. Eight more of his victims are already fighting for their lives and now it's time for Matthews to join the game.
Jigsaw abducts a doctor in order to keep himself alive while he watches his new apprentice put an unlucky citizen named Jeff through a brutal test.
While FBI agents Strahm and Perez are still engulfed in the grisly Jigsaw case, SWAT Commander Rigg is roped in as the last pawn for yet another lethal game of the manic Jigsaw.
Following Jigsaw's grisly demise, Mark Hoffman is commended as a hero, but Agent Strahm is suspicious, and delves into Hoffman's past as another group of people are put through a series of gruesome tests.
Agent Strahm is dead, and FBI agent Erickson draws nearer to Hoffman. Meanwhile, a pair of insurance executives find themselves in another game set by Jigsaw.
The police are at a dead end when investigating numerous ghastly murders in the city that resembles the work of a serial killer who is known to be dead since ten years.
Working in the shadow of an esteemed police veteran, brash Detective Ezekiel “Zeke” Banks and his rookie partner take charge of a grisly investigation into murders that are eerily reminiscent of the city’s gruesome past. Unwittingly entrapped in a deepening mystery, Zeke finds himself at the center of the killer’s morbid game.