Jigsaw and his young apprentice, Amanda, are dead. But the grisly games continue. Five supposed strangers find themselves in the midst of a game, and believe they are in a survival of the fittest competition. Via his now infamous video linked puppet, Jigsaw conveys the message that they should ignore their instincts. Meanwhile, agent Peter Strahm wants to prove that Mark Hoffman is an apprentice to Jigsaw, and pursues him as he continues his twisted games. What Strahm does not realize is that Hoffman is testing him, and must pass his test in order to stay alive.
Following Jigsaw’s grisly demise, Mark Hoffman is commended as a hero, but Agent Strahm is suspicious, and delves into Hoffman’s past. Meanwhile, another group of strangers are put through a series of gruesome tests.