DOCTOR Gordon (Elwes) and photographer Adam (Whannell) wake to find themselves chained to opposite sides of a darkened derelict bathroom, in the middle of which lies the decaying body of a man who appears to have shot himself.

The two strangers soon realise they are the latest victims of a deranged serial killer known as Jigsaw, who teaches his victims life lessons through torture.

More than that, their abductor leaves behind a sickening series of clues to their predicament, which reveals that Dr Gordon and Adam are participants in a deadly game of life and death, which only one of them can survive.

The doctor is ordered to find a way to kill the stranger within a few hours of his family will be murdered.

This is a gritty, grisly horror which is not for the fainthearted.