The game begins in Seattle, where a hanged woman is found with one leg missing. Then, in Vancouver, a corpse is found with both legs missing. Teh clue that binds these horrific crimes together is a game of "Hangman" crudely drawn at each location - painted in the victims' blood.
The victims, it seems, were jurors on a controversial case years ago, in which a man was sentenced to death - by hanging. Two cops on both sides of the border - Canadian detective Zinc Chandler and American detective Maddy Thorne - are up against a killer whose every move means death. To stop him, they must solve the riddle of the hangman - before the madman makes his final, murderous move...and wins the game.