Following Jigsaw's grisly demise, Mark Hoffman becomes the final apprentice to the serial killer and is deigned a hero. Meanwhile, Agent Strahm is tested and puts the pieces together. While Strahm realizes that Hoffman is helping Jigsaw, five seemingly unconnected people are kidnapped and forced to complete a series of tasks in order to survive. Strahm follows all the leads that Hoffman gives him, including information on the death of his sister and...