Saw II is a 2005 horror film directed by Darren Lynn Bousman and written by Leigh Whannell and Bousman. It is the sequel to 2004's Saw and the second installment in the Saw film series. The film stars Donnie Wahlberg, Franky G, Glenn Plummer, Beverley Mitchell, Dina Meyer, Emmanuelle Vaugier, Erik Knudsen, Shawnee Smith, and Tobin Bell. In the film, a group of ex-convicts are trapped by the Jigsaw Killer inside a house and must pass a series of deadly tests to retrieve the antidote for a nerve agent that will kill them in two hours. Meanwhile, a police squad led by Detective Eric Matthews apprehends John Kramer (revealed to be Jigsaw in the first film), but the latter reveals that Matthews' son is part of his game, forcing the detective to wait until Kramer reveals his whereabouts. During Matthews and Kramer's conversation, the latter's backstory is partially explored, revealing one of the reasons why he became Jigsaw.
After the immensely successful opening weekend of 2004's Saw, a sequel was immediately green-lit. Leigh Whannell and James Wan were busy preparing for their next film and were unable to write or direct. Bousman wrote a script called The Desperate before Saw was released and was looking for a producer but many studios rejected it. Gregg Hoffman received the script and showed it to his partners Mark Burg and Oren Koules. It was decided that, with some changes, it could be made into Saw II. Whannell became available to provide rewrites of the script. The film was given a larger budget and was shot from May to June 2005 in Toronto.
Saw II was released in the United States on October 28, 2005, by Lionsgate Films. It opened with $31.9 million and grossed $88 million in the United States and Canada. It has remained the highest grossing Saw film in those countries. Bell was nominated for "Best Villain" at the 2006 MTV Movie Awards for his role as Jigsaw in the film. Saw II was released to DVD on February 14, 2006, and topped charts its first week, selling more than 3 million units. At the time, it was the fastest-selling theatrical DVD in Lionsgate's history. A sequel, titled Saw III, was released in 2006.
Police informant Michael Marks awakens in a room with a spike-filled mask locked around his neck. Michael has one minute to cut into his eye to obtain the key, but can't bring himself to do it and is killed when the mask closes. At the scene of Michael's game, Detective Allison Kerry finds a message for her former partner, Detective Eric Matthews, and calls him in. Matthews joins Kerry and Officer Daniel Rigg in leading a SWAT team to the factory which produced the lock from Michael's trap. There they apprehend John Kramer, the Jigsaw Killer, who indicates computer monitors showing eight people trapped in a house, including his only known survivor Amanda Young, Matthews' son Daniel, and six other victims: Xavier, Jonas, Laura, Addison, Obi, and Gus. A nerve agent filling the house will kill them all within two hours, but John assures Matthews that if he follows the rules of his own game, he will see Daniel again. At Kerry's urging, Matthews agrees to buy time for the tech team to arrive and trace the video signal. During their conversation, John reveals to Matthews that one of his main motivations to become Jigsaw was a suicide attempt after his cancer diagnosis, which led to a newfound appreciation for life; his games' purpose is to help his victims develop the same appreciation.
The group is informed by a microcassette recorder that antidotes are hidden throughout the house; one is in the room's safe, and the tape provides a cryptic clue. Gus ignores a warning note and uses the key provided with the cassette on the door, which triggers a gun through the peephole that kills him. Once the door opens, they search the house and find a basement, where Obi, who helped with the abductions, is killed in a furnace trap while trying to retrieve two antidotes. In another room, Xavier's test involves digging through a pit filled with syringes to retrieve a key to a steel door in two minutes, but he instead throws Amanda into the pit. She retrieves the key, but Xavier fails to unlock the door in time. Throughout the game, the group discuss connections between them and determine that each has been incarcerated before except Daniel. During his father's test, John reveals their affiliation to Matthews who was a corrupt police officer framing his suspects in various crimes recently.
Xavier returns to the safe room and finds a number on the back of Gus' neck. After realizing the numbers is the combination for the safe, he kills Jonas and begins hunting the others. Laura succumbs to the nerve agent and dies, after finding the clue revealing Daniel's identity. Incensed by the revelation, Addison leaves on her own and finds a glass box containing an antidote but her arms become trapped in the openings which are lined with hidden blades. Xavier enters the room and leaves her to die after reading her number. Amanda and Daniel find a tunnel from the first room leading to the dilapidated bathroom. Xavier finds them and, agitated by Amanda's taunts, cuts off a piece of skin from the back of his neck to read his own number. Before Xavier could finish them off, Daniel slits his throat with the hacksaw.
Having seen Xavier chasing his son, Matthews assaults John and forces him to lead him to the house. The tech team tracks the video's source and while Rigg's team searches the house, Kerry realizes that the game took place days before they captured John until the timer for Matthews' game expires to reveal Daniel inside a safe, bound and breathing in an oxygen mask. Unaware of these events, Matthews enters the house alone and makes his way to the bathroom, where he is subdued by a pig-masked figure. He awakens shackled at the ankle to a pipe and finds a tape recorder left by Amanda, who reveals she had become John's accomplice after surviving her first trap and helped him set up Matthews' test during the game at the house, intending to continue John's work after he dies. Amanda then appears and seals the door, leaving Matthews to die as John hears his screams outside and smiles.