Jigsaw is described as a mysterious person who kidnaps people he believes take their lives for granted and places them through "tests", usually mechanical devices rigged to maim or kill the subjects if they fail to complete it within a certain time period.
Jigsaw is described as a mysterious person who kidnaps people he sees as wasting their lives and attempts to save them. This is accomplished by administering various "tests" consisting of mechanical devices rigged to maim or kill the subjects or other victims if not completed within a certain time period.