Sam Dietz is back and must find and stop another serial killer before he kills again. Detective work for Dietz is tough having to juggle two gorgeous women - one his partner, and the other his shrink, who holds the key to the case.
Relentless IV: Ashes to Ashes is a 1994 crime thriller film directed by Oley Sassone. The tagline was: "This time nothing can stop the fear." Relentless IV was filmed in Los Angeles, California. This is the fourth and to date final installment in the Relentless series.