Straight Shooter.

After his daughter died of cancer, former French foreign legionnaire "Straight Shooter" alias Volker Bretz threatens those who financed, built, favoured and now work the nuclear power plant Atar II to kill one of them each day until the plant is shut down. His former drill sergeant, Frank Hector, who now owns several night clubs and brothels, is the only one who might be able to stop the maniac killing specialist. Frank is flown in instantly, but soon has to find out that his former comrade's actions might be a result from an event long ago.