Jigsaw doesn't choose players for his games at random. All, in his opinion, are failing to live life to the fullest due to drug use, crime, or in Jeff Denlon's case, an obsession with vengeance. Following the hit-and-run death of his young son Dylan Denlon (Stefan Georgiou), Jeff dreams of getting even with not only the driver, but the judge who let the driver off easy in court, as well as the woman who witnessed the hit and fled the scene.
Jeff is consumed with anger and obsessed with hoarding Dylan's physical possessions as a way to keep his spirit alive. This, in turn, leads to a pretty stressful living situation for his young daughter, Corbett Denlon (Niamh Wilson). Jigsaw puts Jeff face to face with these three individuals to challenge him to forgive instead of kill.
Meanwhile, Jeff's wife Lynn, a doctor, has been cheating on him, neglecting Corbett and not giving 100% to her patients at the hospital. She's trapped in the same building, forced into a dangerous game of her own: She must keep a dying Jigsaw alive, all with a frantic Amanda — who audiences learn has been helping him from the beginning — nearby. If his heart stops, the collar around Lynn's neck explodes. However, if she keeps Jigsaw breathing until her husband completes his game, she can walk free. Jeff and Lynn have no idea about each other's respective predicaments, and Amanda is unaware of their marriage.
