Michael Winner directs Charles Bronson as a cop on the trail of crime kingpin Martin Balsam and his vicious assassination bureau. If you think Harry Callahan plays dirty you’ve seen nothing yet – above all, Bronson is a relentless Stone Killer! He races against time to uncover a mob plot involving Vietnam veterans to avenge a 40 year old massacre. It’s cross-country mayhem and nonstop action! Jack Colvin, Norman Fell, and Stuart Margolin co-star.