A young man named Adam (Leigh Whannell) wakes to find
himself chained to a rusty pipe inside a decrepit subterranean chamber. Chained
to the opposite side of the room is another bewildered captive, Dr. Lawrence
Gordon (Cary Elwes). Between them is a dead man lying in a pool of blood.
Neither man knows why he has been abducted; but instructions left on a
microcassette order Dr. Gordon to kill Adam within eight hours. If he fails to
do so, then both men will die and Dr. Gordon's wife Alison (Monica Potter), and
his daughter will be killed. Recalling a recent murder investigation by a
police detective named Tapp (Danny Glover), Dr. Gordon realizes he and Adam are
the next victims of a psychopathic genius known only as "Jigsaw."
With only a few hours left to spare, they must unravel the elaborate puzzle of
their fate in the midst of mounting terror. The killer has provided them with
only a few clues and two handsaws - too weak to break their steel shackles,