Blind Fury
(1990)

Nick (Rutger Hauer) brings down the "blind fury" of his samurai sword on all of the mobsters and corrupt policemen, and with Frank's (Terry O'Quinn) help, destroys the drug facility.  After a tearful goodbye, Annie, Frank and his son, Billy (Brandon Call), leave on a bus for San Francisco, but Nick decides to stay back and follow the path of the lone swordsman, walking into the sunset while the credits roll.
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Thanks Mirko!