The film picks up where the first installment left off, with Amanda Young (Shawnee Smith) seemingly freed from Jigsaw's (Tobin Bell) clutches. However, it becomes clear that Amanda is still under Jigsaw's influence, and the story follows Detective Eric Matthews (Donnie Wahlberg) as he searches for his missing son, Daniel (Erik Knudsen). Eric soon finds himself trapped in a series of gruesome games designed by Jigsaw, alongside a group of strangers.