Nils (Stellan Skarsgård) is a snow plough driver, a honorable citizen in Norway. He is informed that his son has died supposedly from a heroin overdose. But he doesn’t believe it since he knows his son was not an addict, therefore, he starts his own investigation and discovers that a local drug gang is behind the crime. Based on the clues collected, he goes after the gang baron and accidentally falls into the crossfire of a war between two rival gangs.