Saw IV

Saw IV is a 2007 CanadianAmerican horror film and the fourth installment of the Saw franchise. It was directed by Darren Lynn Bousman and written by newcomers Patrick Melton, Marcus Dunstan, and Thomas Fenton. It stars Tobin Bell, Costas Mandylor, Scott Patterson, Betsy Russell, Lyriq Bent, Justin Louis, and Donnie Wahlberg. The film was released in North America on October 26, 2007.

During John Kramers autopsy, a waxcoated microcassette is found in his stomach. Detective Mark Hoffman is called in to hear the tape, and learns that he will still be tested and the games will continue. In a mausoleum, two men awaken chained at the neck to a winch. Ones eyes are sewn shut, as is the others mouth, making communication impossible. In a panic, the blinded man activates the winch and attacks the muted man, who kills him and frees himself with the key from his collar.Lieutenant Daniel Riggs SWAT team discovers Allison Kerrys body four days after her death. Hoffman warns Rigg for breaking through an unsecured door to reach her. The scene is also investigated by Kerrys contacts, FBI Agents Peter Strahm and Lindsey Perez, who received a key and message from her. Strahm states that Kerry was killed by an unknown accomplice, noting Kramers and Amanda Youngs physical limitations, and becomes suspicious of Rigg, who has developed an obsession with saving people following Eric Matthews disappearance. That night, Rigg is attacked in his home and wakes up in his bathroom. A videotape shows him that Matthews is alive and has ninety minutes to save himself, with Hoffmans life also at risk. Meanwhile, he must undergo his own tests to face and overcome his obsession. The detectives are soon shown to be set at each end of a large seesaw Matthews is held atop an ice block by a chain noose and Hoffman is strapped to a chair with electrodes at his feet. If Matthews slips or jumps, both will die. A man later arrives to oversee the game. ........

Source: Wikipedia