Saw IV

A wax-covered microcassette is found in John Kramer's stomach during his autopsy, which contains a posthumous message from John that informs Detective Mark Hoffman that he will be tested. Elsewhere, two men – one with his eyes sewn shut, the other with his mouth sewn shut – awaken in a mausoleum, chained at the neck to a winch that begins reeling them in. The muted man is forced to kill the blinded man to get a key from his collar and free himself.