Build a movie plot around this: Reading what drives Lynn hysterics? a letter addressed to her.
A:
Minutes after Amanda Young (Shawnee Smith) leaves him in the underground bathroom at the end of Saw II, Detective Eric Matthews (Donnie Wahlberg) escapes by breaking his foot with a toilet lid and slipping it out of his ankle chain.Six months later, another Jigsaw victim is discovered by Lieutenant Rigg (Lyriq Bent) and Detectives Kerry (Dina Meyer) and Hoffman (Costas Mandylor). In his test, Troy (J. Larose) was to rip chains from his body in order to flee from a bomb; however, the door to the room was sealed, making the trap inescapable and thus going against Jigsaw's methods. Kerry, who feels guilty over Matthews' disappearance, later awakens in a harness hooked into her ribs. A key to unlock the device is within a beaker of acid; though she retrieves it, the device still tears her ribcage apart in opposite directions, making her trap inescapable as well.Jeff (Angus Macfadyen), a man who seeks vengeance for the death of his son, and Lynn Denlon (Bahar Soomekh), a depressed doctor, are also kidnapped under John Kramer's (Tobin Bell) orders. Lynn is brought before John, now bedridden from cancer, by his apprentice Amanda. She is given a straightforward game: keep John alive for the duration of Jeff's game. Should John die, or should she try to escape, the collar around her neck will fire five shotgun shells at her head. Meanwhile, Jeff awakens in the middle of an abandoned meatpacking plant and is informed that he must go through several tests, which will lead him to "the man responsible for the loss of his child. Let the game begin..."In his first test, Jeff enters a freezer and finds a woman named Danica Scott (Debra Lynne McCabe), the only other witness to a drunk-driving accident that killed his son Dylan. By refusing to testify in court, she became an object in Jeff's vengeance. Danica is stripped naked and chained between two poles spraying ice-cold water at random intervals. She eventually convinces Jeff to help her, though she freezes solid before he can retrieve the key from behind frozen metal...