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.

Despite Jigsaw's death, and in order to save the lives of two of his colleagues, Lieutenant Rigg is forced to take part in a new game, which promises to test him to the limit.

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.