Beck Spr i mrker Beck Trails in Darkness is a 1997 film about the Swedish police detective Martin Beck directed by Morten Arnfred. It is the eighth film about Martin Beck with Peter Haber as Martin Beck and Mikael Persbrandt as Gunvald Larsson.
As the investigation progresses it becomes clear that Erik Lindgren, a man who works in the underground, has some kind of connection to the murderers. Once found, he reveals that the murderers are youngsters that mostly inhabit the tunnels, playing action games more specifically, Final Doom against other fools around the globe. He suspects that his sister, Annika is part of the gang, and explains how hes tried to pull her out of the shit. The group has even written a letter to him stating that You talk to the cops and Kickfoot i.e. Annika will die. When Erik guides Beck to the entrance of the hideout of the gang, they are ambushed by the murderers, but the Swedish task force arrives just in time to save Beck, though too late for Erik.Eventually, Beck finds Annika, who initially denies any knowledge about the murders however, when Beck describes to Annika how much Erik loved her and that he was decapitated by the gang, she suddenly breaks down and says that he brought it on himself by trying to interfere with her business, although she did not want her peers to kill him. She eventually proceeds to describe the whole truth the group assumes their Final Doom characters in real life and plays the game by killing people in the underground in order to obtain socalled frags and thereby advance to new levels. This activity is not restricted to Sweden, but shared with people around the world engaging in similar murders. Annika was not part of the actual killings, however, instead being in charge of the technical aspect. ........
Source: Wikipedia